101
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Wang Q, Gu Y, Chen C, Pan F, Song C. Oxide Spintronics as a Knot of Physics and Chemistry: Recent Progress and Opportunities. J Phys Chem Lett 2022; 13:10065-10075. [PMID: 36264651 DOI: 10.1021/acs.jpclett.2c02634] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Transition-metal oxides (TMOs) constitute a key material family in spintronics because of mutually coupled degrees of freedom and tunable magneto-ionic properties. In this Perspective, we consider oxide spintronics as a knot of physics and chemistry and mainly discuss two current hot topics: spin-charge interconversion and magneto-ionics. First, spin-charge interconversion is focused on oxide films and heterostructures including 4d/5d heavy metal oxides (e.g., SrIrO3) and two-dimensional electron gases. Based on spin-charge interconversion, charge currents can be transformed to spin currents and generate spin-orbit torque in oxide/metal and all-oxide heterostructures. Additionally, the voltage control of magnetism in TMOs by the magneto-ionic pathway has rapidly accelerated during the past few years due to the versatile advantages of effective control, nonvolatile nature, low power cost, etc. Typical magneto-ionic oxide systems and corresponding physicochemical mechanisms will be discussed. Finally, further developments of oxide spintronics are envisioned, including material discovery, physics exploration, device design, and manipulation methods.
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Affiliation(s)
- Qian Wang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing100084, China
| | - Youdi Gu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing100084, China
| | - Chong Chen
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing100084, China
| | - Feng Pan
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing100084, China
| | - Cheng Song
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing100084, China
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102
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Gregorin Ž, Sebastián N, Osterman N, Hribar Boštjančič P, Lisjak D, Mertelj A. Dynamics of domain formation in a ferromagnetic fluid. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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103
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Malley S, Reina C, Nacy S, Gilles J, Koohbor B, Youssef G. Predictability of mechanical behavior of additively manufactured particulate composites using machine learning and data-driven approaches. COMPUT IND 2022. [DOI: 10.1016/j.compind.2022.103739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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104
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Two-dimensional multiferroic material of metallic p-doped SnSe. Nat Commun 2022; 13:6130. [PMID: 36253483 PMCID: PMC9576753 DOI: 10.1038/s41467-022-33917-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 10/07/2022] [Indexed: 11/08/2022] Open
Abstract
Two-dimensional multiferroic materials have garnered broad interests attributed to their magnetoelectric properties and multifunctional applications. Multiferroic heterostructures have been realized, nevertheless, the direct coupling between ferroelectric and ferromagnetic order in a single material still remains challenging, especially for two-dimensional materials. Here, we develop a physical vapor deposition approach to synthesize two-dimensional p-doped SnSe. The local phase segregation of SnSe2 microdomains and accompanying interfacial charge transfer results in the emergence of degenerate semiconductor and metallic feature in SnSe. Intriguingly, the room-temperature ferrimagnetism has been demonstrated in two-dimensional p-doped SnSe with the Curie temperature approaching to ~337 K. Meanwhile, the ferroelectricity is maintained even under the depolarizing field introduced by SnSe2. The coexistence of ferrimagnetism and ferroelectricity in two-dimensional p-doped SnSe verifies its multiferroic feature. This work presents a significant advance for exploring the magnetoelectric coupling in two-dimensional limit and constructing high-performance logic devices to extend Moore’s law. 2D multiferroic materials have garnered broad interests due to their magnetoelectric properties and multifunctional applications. Here, the authors discover a multiferroic feature in physical vapor deposition synthesized 2D metallic p-doped SnSe.
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105
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Yu Z, Zhai K, Wang Q, Ding H, Nie A, Wang B, Xiang J, Wen F, Mu C, Xue T, Shen S, Liu Z. Magnetic field reversal of electric polarization and pressure-temperature-magnetic field magnetoelectric phase diagram of the hexaferrite Ba 0.4Sr 1.6Mg 2Fe 12O 22. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:485804. [PMID: 36174548 DOI: 10.1088/1361-648x/ac965c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Pressure, as an independent thermodynamic parameter, is an effective tool to obtain novel material system and exotic physical phenomena not accessible at ambient conditions, because it profoundly modifies the charge, orbital and spin state by reducing the interatomic distance in crystal structure. However, the studies of magnetoelectricity and multiferroicity are rarely extended to high pressure dimension due to properties measured inside the high pressure vessel being a challenge. Here we reported the temperature-magnetic field-pressure magnetoelectric (ME) phase diagram of Y type hexaferrite Ba0.4Sr1.6Mg2Fe12O22derived from static pyroelectric current measurement and dynamic magnetodielectric in diamond anvil cell and piston cylinder cell. We found that a new spin-driven ferroelectric phase emerged atP= 0.7 GPa and sequentially ME effect disappeared aroundP= 4.3 GPa. The external pressure may enhance easy plane anisotropy to destabilize the longitudinal conical magnetic structure with the suppression of ME coefficient. These results offer essential clues for the correlation between ME effect and magnetic structure evolution under high pressure.
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Affiliation(s)
- Zhipeng Yu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Kun Zhai
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Qingkai Wang
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Hao Ding
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Anmin Nie
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Bochong Wang
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Jianyong Xiang
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Fusheng Wen
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Congpu Mu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Tianyu Xue
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Shipeng Shen
- The Institute of Advance Materials, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Zhongyuan Liu
- Center for High Pressure Science (CHiPS), State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, People's Republic of China
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106
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A Symmetrical Quartz-Based Magnetoelectric Sensor for Pico-Tesla Magnetic Field Detection. Symmetry (Basel) 2022. [DOI: 10.3390/sym14102130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The magnetic sensor should acquire a high detection ability over a wide low-frequency (LF) band of 1–100 Hz for biomagnetic measurements due to the large LF noise. This work presents a magnetic sensor with a modulation coil based on the tri-layer symmetrical Metglas/Quartz/Metglas laminate for LF magnetic fields detection. The Metglas/Quartz/Metglas laminate was fabricated using a rectangle quartz plate with twenty Metglas foils epoxy glued symmetrically. Additionally, the coil can be used to generate modulation voltage. The limit of detection (LOD) of the fabricated symmetrical magnetoelectric (ME) sensor has been measured and optimized without DC bias via frequency modulation technique. Experimental results demonstrate that the proposed ME sensor can detect a small magnetic field of 11 pT at 1 Hz. Moreover, the Metglas thickness and the modulation voltage also have been optimized and the detection ability of the fabricated sensor has been enhanced with a lower LOD value of 2.7 pT at 1 Hz. This paper provides a symmetrical magnetoelectric sensor using piezoelectric quartz material for LF pico-Tesla magnetic field signals detection. Additionally, the symmetrical sensor without bias can provide a cost-effective and high-performance approach for LF magnetic field detection.
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107
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Zhang J, Liu N, Zhang T, Hu S, Wu S, Wang W, Wang Z, Zhang W, Ye J. Tuning oxygen vacancies in epitaxial LaInO 3 films for ultraviolet photodetection. OPTICS LETTERS 2022; 47:5044-5047. [PMID: 36181182 DOI: 10.1364/ol.470587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
LaInO3 (LIO) represents a new, to the best of knowledge, type of perovskite oxides for deep-ultraviolet (DUV) photodetection owing to the wide bandgap nature (∼5.0 eV) and the higher tolerance of defect engineering for tunable carrier transport. Here we fabricate fast-response DUV photodetectors based on epitaxial LIO thin films and demonstrate an effective strategy for balancing the photodetector performance using the oxygen growth pressure as a simple control parameter. Increasing the oxygen pressure is effective to suppress the oxygen vacancy formation in LIO, which is beneficial to suppress the dark current and enhance the response speed. The optimized LIO photodetector achieves a fast rise/fall time of 20 ms/73 ms, a low dark current of 2.0 × 10-12 A, a photo-to-dark current ratio of 1.2 × 103, and a detectivity of 6 × 1012 Jones.
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108
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Zhu Y, Sun K, Wu S, Zhou P, Fu Y, Xia J, Li HF. A comprehensive review on the ferroelectric orthochromates: Synthesis, property, and application. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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109
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Valiulin VE, Chtchelkatchev NM, Mikheyenkov AV, Vinokur VM. Time-dependent exchange creates the time-frustrated state of matter. Sci Rep 2022; 12:16177. [PMID: 36171223 PMCID: PMC9519972 DOI: 10.1038/s41598-022-19751-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 09/02/2022] [Indexed: 12/02/2022] Open
Abstract
Magnetic systems governed by exchange interactions between magnetic moments harbor frustration that leads to ground state degeneracy and results in the new topological state often referred to as a frustrated state of matter (FSM). The frustration in the commonly discussed magnetic systems has a spatial origin. Here we demonstrate that an array of nanomagnets coupled by the real retarded exchange interactions develops a new state of matter, time frustrated matter (TFM). In a spin system with the time-dependent retarded exchange interaction, a single spin-flip influences other spins not instantly but after some delay. This implies that the sign of the exchange interaction changes, leading to either ferro- or antiferromagnetic interaction, depends on time. As a result, the system’s temporal evolution is essentially non-Markovian. The emerging competition between different magnetic orders leads to a new kind of time-core frustration. To establish this paradigmatic shift, we focus on the exemplary system, a granular multiferroic, where the exchange transferring medium has a pronounced frequency dispersion and hence develops the TFM.
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Affiliation(s)
- V E Valiulin
- Vereshchagin Institute of High Pressure Physics, Russian Academy of Sciences, 108840, Troitsk, Moscow, Russia.,Moscow Institute of Physics and Technology, 141701, Dolgoprudny, Russia
| | - N M Chtchelkatchev
- Vereshchagin Institute of High Pressure Physics, Russian Academy of Sciences, 108840, Troitsk, Moscow, Russia
| | - A V Mikheyenkov
- Vereshchagin Institute of High Pressure Physics, Russian Academy of Sciences, 108840, Troitsk, Moscow, Russia.,Moscow Institute of Physics and Technology, 141701, Dolgoprudny, Russia
| | - V M Vinokur
- Terra Quantum AG, Kornhausstrasse 25, 9000, St. Gallen, Switzerland. .,Physics Department, City College of the City University of New York, 160 Convent Ave, New York, NY, 10031, USA.
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110
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Shirsath SE, Assadi MHN, Zhang J, Kumar N, Gaikwad AS, Yang J, Maynard-Casely HE, Tay YY, Du J, Wang H, Yao Y, Chen Z, Zhang J, Zhang S, Li S, Wang D. Interface-Driven Multiferroicity in Cubic BaTiO 3-SrTiO 3 Nanocomposites. ACS NANO 2022; 16:15413-15424. [PMID: 36070478 DOI: 10.1021/acsnano.2c07215] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Perovskite multiferroics have drawn significant attention in the development of next-generation multifunctional electronic devices. However, the majority of existing multiferroics exhibit ferroelectric and ferromagnetic orderings only at low temperatures. Although interface engineering in complex oxide thin films has triggered many exotic room-temperature functionalities, the desired coupling of charge, spin, orbital and lattice degrees of freedom often imposes stringent requirements on deposition conditions, layer thickness and crystal orientation, greatly hindering their cost-effective large-scale applications. Herein, we report an interface-driven multiferroicity in low-cost and environmentally friendly bulk polycrystalline material, namely cubic BaTiO3-SrTiO3 nanocomposites which were fabricated through a simple, high-throughput solid-state reaction route. Interface reconstruction in the nanocomposites can be readily controlled by the processing conditions. Coexistence of room-temperature ferromagnetism and ferroelectricity, accompanying a robust magnetoelectric coupling in the nanocomposites, was confirmed both experimentally and theoretically. Our study explores the 'hidden treasure at the interface' by creating a playground in bulk perovskite oxides, enabling a broad range of applications that are challenging with thin films, such as low-power-consumption large-volume memory and magneto-optic spatial light modulator.
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Affiliation(s)
- Sagar E Shirsath
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - M Hussein N Assadi
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Ji Zhang
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Nitish Kumar
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Anil S Gaikwad
- Department of Physics, Vivekanand College, Aurangabad 431001, Maharashtra, India
| | - Jack Yang
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
- UNSW Materials and Manufacturing Futures Institute, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Helen E Maynard-Casely
- Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Yee Yan Tay
- Facility for Analysis, Characterization, Testing and Simulation and School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Jianhao Du
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Haoyu Wang
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yin Yao
- Mark Wainwright Analytical Centre UNSW Sydney, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Zibin Chen
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Jinxing Zhang
- Department of Physics, Beijing Normal University, 100875 Beijing, China
| | - Shujun Zhang
- Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, New South Wales 2500, Australia
| | - Sean Li
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
- UNSW Materials and Manufacturing Futures Institute, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Danyang Wang
- School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
- UNSW Materials and Manufacturing Futures Institute, The University of New South Wales, Sydney, New South Wales 2052, Australia
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111
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Yanagisawa J, Tanaka K, Kano H, Miyata K, Le Ouay B, Ohtani R, Ohba M. Vapor-Induced Conversion of a Centrosymmetric Organic-Inorganic Hybrid Crystal into a Proton-Conducting Second-Harmonic-Generation-Active Material. Inorg Chem 2022; 61:15638-15644. [PMID: 36130162 DOI: 10.1021/acs.inorgchem.2c02555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chemical responsivity in materials is essential to build systems with switchable functionalities. However, polarity-switchable materials are still rare because inducing a symmetry breaking of the crystal structure by adsorbing chemical species is difficult. In this study, we demonstrate that a molecular organic-inorganic hybrid crystal of (NEt4)2[MnN(CN)4] (1) undergoes polarity switching induced by water vapor and transforms into a rare example of proton-conducting second-harmonic-generation-active material. Centrosymmetric 1 transforms into noncentrosymmetric polar 1·3H2O and 1·MeOH by accommodating water and methanol molecules, respectively. However, only water vapor causes a spontaneous single-crystal-to-single-crystal transition. Moreover, 1·3H2O shows proton conduction with 2.3 × 10-6 S/cm at 298 K and a relative humidity of 80%.
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Affiliation(s)
- Junichi Yanagisawa
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kyosuke Tanaka
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hideaki Kano
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kiyoshi Miyata
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Benjamin Le Ouay
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Ryo Ohtani
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaaki Ohba
- Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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112
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Zhang J, Zhou Y, Wang F, Shen X, Wang J, Lu X. Coexistence and Coupling of Spin-Induced Ferroelectricity and Ferromagnetism in Perovskites. PHYSICAL REVIEW LETTERS 2022; 129:117603. [PMID: 36154411 DOI: 10.1103/physrevlett.129.117603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 12/03/2021] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Spin-induced ferroelectricity usually does not occur in perovskites with simple collinear magnetic structures. Here, we demonstrate that in even-layer perovskite systems, some common distortion modes involving octahedral rotation and Jahn-Teller distortion can break the inversion symmetry, allowing the emergence of spin-dependent out-of-plane polarization in a simple magnetic structure. Such spin-induced ferroelectricity is very common in double-perovskite systems and can coexist with ferromagnetism or ferrimagnetism above room temperature. We explain its origin by modifying the spin-dependent p-d hybridization mechanism. Our Letter provides a universal design for two-dimensional multiferroics and enables the control of polarization by means of a magnetic field.
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Affiliation(s)
- Junting Zhang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Ying Zhou
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Fan Wang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Xiaofan Shen
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Jianli Wang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Xiaomei Lu
- National Laboratory of Solid State Microstructures and Physics School, Nanjing University, Nanjing 210093, China
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113
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Fan Y, Deng S, Li T, Zhang Q, Xu S, Li H, Huo C, Wang J, Gu L, Jin K, Diéguez O, Guo EJ, Chen J. Improved multiferroic in EuTiO3 films by interphase strain engineering. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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114
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Liu P, Miao J, Liu Q, Xu Z, Wu Y, Meng K, Xu X, Jiang Y. Large non-volatile modulation of perpendicular magnetic anisotropy in Pb (Zr0.2Ti0.8) O3/SrRuO3. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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115
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Structural evolution of single-crystal RECrO3 (RE = Y, Eu–Lu) orthochromates. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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116
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Liu S, Xiang F, Cheng Y, Luo Y, Sun J. Multiferroic and Magnetodielectric Effects in Multiferroic Pr 2FeAlO 6 Double Perovskite. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3011. [PMID: 36080048 PMCID: PMC9457962 DOI: 10.3390/nano12173011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/29/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
Single-phase multiferroics that allow the coexistence of ferroelectric and magnetic ordering above room temperature are highly desirable, and offer a fundamental platform for novel functionality. In this work, a double perovskite multiferroic Pr2FeAlO6 ceramic is prepared using a sol-gel process followed by a quenching treatment. The well-crystallized and purified Pr2FeAlO6 in trigonal structure with space group R3c is confirmed. A combination of the ferroelectric (2Pr = 0.84 μC/cm2, Ec = 7.78 kV/cm at an applied electric field of 20 kV/cm) and magnetic (2Mr = 433 memu/g, Hc = 3.3 kOe at an applied magnetic field of 1.0 T) hysteresis loops reveals the room-temperature multiferroic properties. Further, the magnetoelectric effect is observed from the measurements of magnetically induced dielectric response and polarization. The present results suggest a new complex oxide candidate for room-temperature multiferroic applications.
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Affiliation(s)
- Sheng Liu
- Hunan Institute of Engineering, College of Mechanical Engineering, No.88, East Fuxing Road, Xiangtan 411104, China
| | - Feng Xiang
- Hunan Institute of Engineering, College of Mechanical Engineering, No.88, East Fuxing Road, Xiangtan 411104, China
| | - Yulan Cheng
- Hunan Institute of Engineering, College of Mechanical Engineering, No.88, East Fuxing Road, Xiangtan 411104, China
| | - Yajun Luo
- Hunan Institute of Engineering, College of Mechanical Engineering, No.88, East Fuxing Road, Xiangtan 411104, China
| | - Jing Sun
- Hunan Institute of Engineering, School of Electrical and Information Engineering, Xiangtan 411104, China
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117
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Shen X, Zhou L, Liu Z, He J, Ye X, Liu G, Qin S, Lu D, Zhang J, Sun Y, Long Y. Magnetoelectric and Magnetostrictive Effects in Scheelite-Type HoCrO 4. Inorg Chem 2022; 61:14030-14037. [PMID: 35984686 DOI: 10.1021/acs.inorgchem.2c02022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Scheelite-type HoCrO4 was prepared by treating the ambient-pressure zircon-type precursor phase under 8 GPa and 700 K. A long-range antiferromagnetic phase transition is found to occur at TN ≈ 23 K due to the spin order of Ho3+ and Cr5+ magnetic ions. However, the antiferromagnetic ground state is sensitive to an external magnetic field and a moderate field of about 1.1 T can induce a metamagnetic transition, giving rise to the presence of a large magnetization up to 8.5 μB/f.u. at 2 K and 7 T. Considerable linear magnetoelectric effect is observed in the antiferromagnetic state, while the induced electric polarization experiences a sharp increase near the critical field of the metamagnetic transition. Ferromagnetism and ferroelectricity thus rarely coexist under higher magnetic fields in scheelite-type HoCrO4. Moreover, a magnetic field also plays an important role in the longitudinal constriction of HoCrO4, and a significant magnetostrictive effect with a value of up to 300 ppm is observed at 2 K and 9 T, which can be attributed to the strong anisotropy of the rare-earth Ho3+ ion. Possible coupling between magnetoelectric and magnetoelastic effects is discussed.
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Affiliation(s)
- Xudong Shen
- Songshan Lake Materials Laboratory, Dongguan 523808, Guangdong, China.,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Long Zhou
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhehong Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jincheng He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,Center of Quantum Materials and Devices and Department of Applied Physics, Chongqing University, Chongqing 401331, China
| | - Xubin Ye
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangxiu Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shijun Qin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dabiao Lu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jie Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Young Sun
- Center of Quantum Materials and Devices and Department of Applied Physics, Chongqing University, Chongqing 401331, China
| | - Youwen Long
- Songshan Lake Materials Laboratory, Dongguan 523808, Guangdong, China.,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
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118
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Hu C, Chen J, Du E, Ju W, An Y, Gong SJ. Ferroelectric control of band alignments and magnetic properties in the two-dimensional multiferroic VSe 2/In 2Se 3. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:425801. [PMID: 35878601 DOI: 10.1088/1361-648x/ac8406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Our first-principles evidence shows that the two-dimensional (2D) multiferroic VSe2/In2Se3experiences continuous change of electronic structures, i.e. with the change of the ferroelectric (FE) polarization of In2Se3, the heterostructure can possess type-I, -II, and -III band alignments. When the FE polarization points from In2Se3to VSe2, the heterostructure has a type-III band alignment, and the charge transfer from In2Se3into VSe2induces half-metallicity. With reversal of the FE polarization, the heterostructure enters the type-I band alignment, and the spin-polarized current is turned off. When the In2Se3is depolarized, the heterostructure has a type-II band alignment. In addition, influence of the FE polarization on magnetism and magnetic anisotropy energy of VSe2was also analyzed, through which we reveal the interfacial magnetoelectric coupling effects. Our investigation about VSe2/In2Se3predicts its wide applications in the fields of both 2D spintronics and multiferroics.
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Affiliation(s)
- Chen Hu
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Ju Chen
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Erwei Du
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Weiwei Ju
- College of Physics and Engineering and Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, People's Republic of China
| | - Yipeng An
- School of Physics and Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang 453007, People's Republic of China
| | - Shi-Jing Gong
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China
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119
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Karpinsky DV, Silibin MV, Latushka SI, Zhaludkevich DV, Sikolenko VV, Svetogorov R, Sayyed MI, Almousa N, Trukhanov A, Trukhanov S, Belik AА. Temperature-Driven Transformation of the Crystal and Magnetic Structures of BiFe 0.7Mn 0.3O 3 Ceramics. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2813. [PMID: 36014678 PMCID: PMC9413088 DOI: 10.3390/nano12162813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/05/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
The compound BiFe0.7Mn0.3O3 consisting at room temperature of coexistent anti-polar orthorhombic and polar rhombohedral phases has a metastable structural state, which has been studied by laboratory X-ray, synchrotron and neutron diffraction, magnetometry, differential thermal analysis, and differential scanning calorimetry. Thermal annealing of the sample at temperatures above the temperature-driven phase transition into the single phase rhombohedral structure (~700 K) causes an increase of the volume fraction of the rhombohedral phase at room temperature from ~10% up to ~30%, which is accompanied by the modification of the magnetic state, leading to strengthening of a ferromagnetic component. A strong external magnetic field (~5 T) applied to the sample notably changes its magnetic properties, as well as provides a reinforcement of the ferromagnetic component, thus leading to an interaction between two magnetic subsystems formed by the antiferromagnetic matrix with non-collinear alignment of magnetic moments and the nanoscale ferromagnetic clusters coexisting within it. The modification of the structural state and magnetic properties of the compounds and a correlation between different structural and magnetic phases are discussed focusing on the effect of thermal annealing and the impact of an external magnetic field.
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Affiliation(s)
- Dmitry V. Karpinsky
- Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus
- Institute for Advanced Materials and Technologies, National Research University of Electronic Technology “MIET”, 124498 Zelenograd, Moscow, Russia
| | - Maxim V. Silibin
- Institute for Advanced Materials and Technologies, National Research University of Electronic Technology “MIET”, 124498 Zelenograd, Moscow, Russia
| | - Siarhei I. Latushka
- Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus
- Institute for Advanced Materials and Technologies, National Research University of Electronic Technology “MIET”, 124498 Zelenograd, Moscow, Russia
| | - Dmitry V. Zhaludkevich
- Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus
- Institute for Advanced Materials and Technologies, National Research University of Electronic Technology “MIET”, 124498 Zelenograd, Moscow, Russia
| | - Vadim V. Sikolenko
- Institute for Advanced Materials and Technologies, National Research University of Electronic Technology “MIET”, 124498 Zelenograd, Moscow, Russia
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - Roman Svetogorov
- NRC “Kurchatov Institute”, Acad. Kurchatov Sq. 1, 123182 Moscow, Russia
| | - M. I. Sayyed
- Department of Physics, Faculty of Science, Isra University, Amman 1162, Jordan
| | - Nouf Almousa
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Alex Trukhanov
- Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus
- Smart Sensors Laboratory, National University of Science and Technology MISiS, 119049 Moscow, Russia
| | - Sergei Trukhanov
- Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus
| | - Alexei А. Belik
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Ibaraki, Japan
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120
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Yang Y, Ji J, Feng J, Chen S, Bellaiche L, Xiang H. Two-Dimensional Organic-Inorganic Room-Temperature Multiferroics. J Am Chem Soc 2022; 144:14907-14914. [PMID: 35926166 DOI: 10.1021/jacs.2c06347] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Organic-inorganic multiferroics are promising for the next generation of electronic devices. To date, dozens of organic-inorganic multiferroics have been reported; however, most of them show a magnetic Curie temperature much lower than room temperature, which drastically hampers their application. Here, by performing first-principles calculations and building effective model Hamiltonians, we reveal a molecular orbital-mediated magnetic coupling mechanism in two-dimensional Cr(pyz)2 (pyz = pyrazine) and the role that the valence state of the molecule plays in determining the magnetic coupling type between metal ions. Based on these, we demonstrate that a two-dimensional organic-inorganic room-temperature multiferroic, Cr(h-fpyz)2 (h-fpyz = half-fluoropyrazine), can be rationally designed by introducing ferroelectricity in Cr(pyz)2 while keeping the valence state of the molecule unchanged. Our work not only reveals the origin of magnetic coupling in 2D organic-inorganic systems but also provides a way to design room-temperature multiferroic materials rationally.
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Affiliation(s)
- Yali Yang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, and Department of Physics, Fudan University, Shanghai 200433, China.,Shanghai Qi Zhi Institute, Shanghai 200030, China
| | - Junyi Ji
- Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, and Department of Physics, Fudan University, Shanghai 200433, China.,Shanghai Qi Zhi Institute, Shanghai 200030, China
| | - Junsheng Feng
- School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China
| | - Shiyou Chen
- Shanghai Qi Zhi Institute, Shanghai 200030, China.,State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai 200433, China
| | - Laurent Bellaiche
- Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Hongjun Xiang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, and Department of Physics, Fudan University, Shanghai 200433, China.,Shanghai Qi Zhi Institute, Shanghai 200030, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
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121
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Cheng Y, Dong G, Li Y, Yang G, Zhang B, Guan M, Zhou Z, Liu M. Strain Modulation of Perpendicular Magnetic Anisotropy in Wrinkle-Patterned (Co/Pt) 5/BaTiO 3 Magnetoelectric Heterostructures. ACS NANO 2022; 16:11291-11299. [PMID: 35848713 DOI: 10.1021/acsnano.2c04754] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The rapid development of spintronics requires the devices to be flexible, to be used in wearable electronics, and controllable, to be used with magnetoelectric (ME) structures. However, the clamping effect inevitably leads to a decreased ME effect on the rigid substrate, and it remains challenging to directly prepare high-quality ferroelectric (FE) membranes on the widely used flexible substrate such as MICA or polyimide (PI). Here, periodic wrinkle-patterned flexible (Co/Pt)5/BaTiO3 (BTO) perpendicular magnetic anisotropy (PMA) heterostructures were prepared using the water-soluble method. The high-quality single-crystal BTO membrane ensures that intricate wrinkles do not fracture and a high ME coefficient is achievable. The transferred sample that is released from the clamping effect shows an enhanced ME effect in both in-plane and out-of-plane directions, with the ME coefficient reaching up to 68 Oe °C-1. The ferromagnetic resonance (FMR) field of the flexible sample can be tuned by tensile strain up to 272 Oe. The finely controlled wrinkle shows periodic strain variations at peak and valley regions that switch the PMA magnetic domain motion as an effective control method. The proposed ultraflexible wrinkle sample shows great potential for combining multiple magnetization tuning approaches, allowing it to potentially serve as a tunable high-density 3D storage prototype.
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Affiliation(s)
- Yuxin Cheng
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guohua Dong
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yaojin Li
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guannan Yang
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Butong Zhang
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Mengmeng Guan
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ziyao Zhou
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ming Liu
- The Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi'an Jiaotong University, Xi'an 710049, China
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122
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Shen J, He Z, Zhang D, Lu P, Deitz J, Shang Z, Kalaswad M, Wang H, Xu X, Wang H. Tunable physical properties in Bi-based layered supercell multiferroics embedded with Au nanoparticles. NANOSCALE ADVANCES 2022; 4:3054-3064. [PMID: 36133520 PMCID: PMC9419076 DOI: 10.1039/d2na00169a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 06/06/2022] [Indexed: 06/16/2023]
Abstract
Multiferroic materials are an interesting functional material family combining two ferroic orderings, e.g., ferroelectric and ferromagnetic orderings, or ferroelectric and antiferromagnetic orderings, and find various device applications, such as spintronics, multiferroic tunnel junctions, etc. Coupling multiferroic materials with plasmonic nanostructures offers great potential for optical-based switching in these devices. Here, we report a novel nanocomposite system consisting of layered Bi1.25AlMnO3.25 (BAMO) as a multiferroic matrix and well dispersed plasmonic Au nanoparticles (NPs) and demonstrate that the Au nanoparticle morphology and the nanocomposite properties can be effectively tuned. Specifically, the Au particle size can be tuned from 6.82 nm to 31.59 nm and the 6.82 nm one presents the optimum ferroelectric and ferromagnetic properties and plasmonic properties. Besides the room temperature multiferroic properties, the BAMO-Au nanocomposite system presents other unique functionalities including localized surface plasmon resonance (LSPR), hyperbolicity in the visible region, and magneto-optical coupling, which can all be effectively tailored through morphology tuning. This study demonstrates the feasibility of coupling single phase multiferroic oxides with plasmonic metals for complex nanocomposite designs towards optically switchable spintronics and other memory devices.
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Affiliation(s)
- Jianan Shen
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Zihao He
- School of Electrical and Computer Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Di Zhang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Ping Lu
- Sandia National Laboratories Albuquerque New Mexico 87185 USA
| | - Julia Deitz
- Sandia National Laboratories Albuquerque New Mexico 87185 USA
| | - Zhongxia Shang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Matias Kalaswad
- School of Electrical and Computer Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Haohan Wang
- Department of Physics and Astronomy, University of Nebraska-Lincoln Lincoln Nebraska 68588 USA
| | - Xiaoshan Xu
- Department of Physics and Astronomy, University of Nebraska-Lincoln Lincoln Nebraska 68588 USA
| | - Haiyan Wang
- School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
- School of Electrical and Computer Engineering, Purdue University West Lafayette Indiana 47907 USA
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123
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Agarwal P, Huang L, Ter Lim S, Singh R. Electric-field control of nonlinear THz spintronic emitters. Nat Commun 2022; 13:4072. [PMID: 35835753 PMCID: PMC9283400 DOI: 10.1038/s41467-022-31789-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 07/04/2022] [Indexed: 11/30/2022] Open
Abstract
Energy-efficient spintronic technology holds tremendous potential for the design of next-generation processors to operate at terahertz frequencies. Femtosecond photoexcitation of spintronic materials generates sub-picosecond spin currents and emission of terahertz radiation with broad bandwidth. However, terahertz spintronic emitters lack an active material platform for electric-field control. Here, we demonstrate a nonlinear electric-field control of terahertz spin current-based emitters using a single crystal piezoelectric Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT) that endows artificial magnetoelectric coupling onto a spintronic terahertz emitter and provides 270% modulation of the terahertz field at remnant magnetization. The nonlinear electric-field control of the spins occurs due to the strain-induced change in magnetic energy of the ferromagnet thin-film. Results also reveal a robust and repeatable switching of the phase of the terahertz spin current. Electric-field control of terahertz spintronic emitters with multiferroics and strain engineering offers opportunities for the on-chip realization of tunable energy-efficient spintronic-photonic integrated platforms. Spintronic terahertz (THz) emitters are a class of magnetic heterostructure where femtosecond laser excitations generate THz radiation emission. While they have great potential, electric field control of spintronic emitter remains a challenge. Here, by combining a spintronic emitter with a piezoelectric substrate, Agarwal et al. demonstrate electric field control of THz emission through induced piezostrain.
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Affiliation(s)
- Piyush Agarwal
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.,Center for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore, 639798, Singapore
| | - Lisen Huang
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way, Innovis, Singapore, 138364, Singapore
| | - Sze Ter Lim
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way, Innovis, Singapore, 138364, Singapore
| | - Ranjan Singh
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore. .,Center for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore, 639798, Singapore.
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124
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Huang C, Zhou J, Sun H, Wu F, Hou Y, Kan E. Toward Room-Temperature Electrical Control of Magnetic Order in Multiferroic van der Waals Materials. NANO LETTERS 2022; 22:5191-5197. [PMID: 35639726 DOI: 10.1021/acs.nanolett.2c00930] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Electrical control of magnetic order in van der Waals (vdW) two-dimensional (2D) systems is appealing for high-efficiency and low-dissipation nanospintronic devices. For realistic applications, a vdW 2D material with ferromagnetic (FM) and ferroelectric (FE) orders coexisting and strongly coupling at room temperature is urgently needed. Here we present a potential candidate for nonvolatile electric-field control of magnetic orders at room temperature. Using first-principles calculations, we predict the coexistence of room-temperature FM and FE orders in a 2D transition metal carbide, where the spatial distribution of magnetic moments strongly couples with the orientation of out-of-plane electric polarization. Furthermore, an electric-field switching between interfacial FM and ferrimagnetic orders is realizable through constructing a multiferroic vdW heterostructure based on this material. These findings make a significant step toward realizing room-temperature multiferroicity and strong magnetoelectric coupling in 2D materials.
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Affiliation(s)
- Chengxi Huang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Jian Zhou
- Center for Alloy Innovation and Design, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Huasheng Sun
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Fang Wu
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, Jiangsu 210037, P. R. China
| | - Yusheng Hou
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, Center for Neutron Science and Technology, School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
| | - Erjun Kan
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
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125
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Topologically protected magnetoelectric switching in a multiferroic. Nature 2022; 607:81-85. [PMID: 35794266 DOI: 10.1038/s41586-022-04851-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 05/11/2022] [Indexed: 11/08/2022]
Abstract
Electric control of magnetism and magnetic control of ferroelectricity can improve the energy efficiency of magnetic memory and data-processing devices1. However, the necessary magnetoelectric switching is hard to achieve, and requires more than just a coupling between the spin and the charge degrees of freedom2-5. Here we show that an application and subsequent removal of a magnetic field reverses the electric polarization of the multiferroic GdMn2O5, thus requiring two cycles to bring the system back to the original configuration. During this unusual hysteresis loop, four states with different magnetic configurations are visited by the system, with one half of all spins undergoing unidirectional full-circle rotation in increments of about 90 degrees. Therefore, GdMn2O5 acts as a magnetic crankshaft that converts the back-and-forth variations of the magnetic field into a circular spin motion. This peculiar four-state magnetoelectric switching emerges as a topologically protected boundary between different two-state switching regimes. Our findings establish a paradigm of topologically protected switching phenomena in ferroic materials.
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126
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Das S, Mitra A, Sadhukhan S, Das A, Chatterjee S, Chakrabarti PK. Spin reorientation behavior and enhanced multiferroic properties of co-doped YFeO3 towards a monophasic multiferroic ceramic Co0.05Y0.95Fe0.95Ti0.05O3. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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127
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Wendari TP, Arief S, Mufti N, Blake GR, Baas J, Suendo V, Prasetyo A, Insani A, Zulhadjri Z. Lead-Free Aurivillius Phase Bi 2LaNb 1.5Mn 0.5O 9: Structure, Ferroelectric, Magnetic, and Magnetodielectric Effects. Inorg Chem 2022; 61:8644-8652. [PMID: 35622976 DOI: 10.1021/acs.inorgchem.1c03624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Aurivillius phase Bi2LaNb1.5Mn0.5O9, derived from ferroelectric PbBi2Nb2O9 by simultaneous substitution of the A-site and B-site cations, was synthesized using a molten-salt method. Here, we discuss the structure-property relationships in detail. X-ray and neutron diffraction show that Bi2LaNb1.5Mn0.5O9 adopts an A21am orthorhombic crystal structure. Rietveld refinement analysis, supported by Raman spectroscopy, indicates that the Bi3+ ions occupy the bismuth oxide blocks, La3+ ions occupy the perovskite A-site, and Nb5+/Mn3+ ions occupy the perovskite B-site. Ferroelectric ordering takes place at 535 K, which coexists with local ferromagnetic order below 65 K. The cation disorder on the B-site results in relaxor-ferroelectric behavior, and the short-range ferromagnetic order can be attributed to Mn3+/Mn4+ double-exchange. Magnetodielectric coupling measured at 5 K and 100 kHz in a field of 5 T suggests the existence of intrinsic spin-lattice coupling with a magnetodielectric coefficient of 0.20%. These findings will provide significant impetus for further research into potential devices based on the magnetodielectric effect in Aurivillius materials.
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Affiliation(s)
- Tio Putra Wendari
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Kampus Limau Manis, Padang 25163, Indonesia
| | - Syukri Arief
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Kampus Limau Manis, Padang 25163, Indonesia
| | - Nandang Mufti
- Center of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang 5, Malang 65145, Indonesia
| | - Graeme R Blake
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Jacob Baas
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Veinardi Suendo
- Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Anton Prasetyo
- Department of Chemistry, Faculty of Science and Technology, Universitas Islam Negeri Maulana Malik Ibrahim Malang, Jl. Gajayana 50, Malang 65144, Indonesia
| | - Andon Insani
- Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency of Indonesia, Puspiptek Serpong, Tangerang Selatan 15314, Indonesia
| | - Zulhadjri Zulhadjri
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Kampus Limau Manis, Padang 25163, Indonesia
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128
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Structural and Magnetic Phase Transitions in BiFe 1 - xMn xO 3 Solid Solution Driven by Temperature. NANOMATERIALS 2022; 12:nano12091565. [PMID: 35564274 PMCID: PMC9103236 DOI: 10.3390/nano12091565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/29/2022] [Accepted: 05/03/2022] [Indexed: 02/05/2023]
Abstract
The crystal structure and magnetic state of the (1 − x)BiFeO3-(x)BiMnO3 solid solution has been analyzed by X-ray diffraction using lab-based and synchrotron radiation facilities, magnetization measurements, differential thermal analysis, and differential scanning calorimetry. Dopant concentration increases lead to the room-temperature structural transitions from the polar-active rhombohedral phase to the antipolar orthorhombic phase, and then to the monoclinic phase accompanied by the formation of two-phase regions consisting of the adjacent structural phases in the concentration ranges 0.25 < x1 < 0.30 and 0.50 ≤ x2 < 0.65, respectively. The accompanied changes in the magnetic structure refer to the magnetic transitions from the modulated antiferromagnetic structure to the non-colinear antiferromagnetic structure, and then to the orbitally ordered ferromagnetic structure. The compounds with a two-phase structural state at room temperature are characterized by irreversible temperature-driven structural transitions, which favor the stabilization of high-temperature structural phases. The magnetic structure of the compounds also exhibits an irreversible temperature-induced transition, resulting in an increase of the contribution from the magnetic phase associated with the high-temperature structural phase. The relationship between the structural parameters and the magnetic state of the compounds with a metastable structure is studied and discussed depending on the chemical composition and heating prehistory.
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129
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Spachmann S, Berdonosov P, Markina M, Vasiliev A, Klingeler R. Linear magnetoelastic coupling and magnetic phase diagrams of the buckled-kagomé antiferromagnet [Formula: see text]. Sci Rep 2022; 12:7383. [PMID: 35513475 PMCID: PMC9072401 DOI: 10.1038/s41598-022-11368-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 04/22/2022] [Indexed: 11/08/2022] Open
Abstract
Single crystals of Cu[Formula: see text]Bi(SeO[Formula: see text])[Formula: see text]O[Formula: see text]Cl were investigated using high-resolution capacitance dilatometry in magnetic fields up to 15 T. Pronounced magnetoelastic coupling is found upon evolution of long-range antiferromagnetic order at [Formula: see text] [Formula: see text] K. Grüneisen analysis reveals moderate effects of uniaxial pressure on [Formula: see text], of 1.8(4) K/GPa, [Formula: see text] K/GPa and 0.33(10) K/GPa for [Formula: see text], b, and c, respectively. Below 22 K Grüneisen scaling fails which implies the presence of competing interactions. The structural phase transition at [Formula: see text] [Formula: see text] K is much more sensitive to uniaxial pressure than [Formula: see text], with strong effects of up to 27(3) K/GPa ([Formula: see text]). Magnetostriction and magnetization measurements reveal a linear magnetoelastic coupling for [Formula: see text] below [Formula: see text], as well as a mixed phase behavior above the tricritical point around 0.4 T. An analysis of the critical behavior in zero-field points to three-dimensional (3D) Ising-like magnetic ordering. In addition, the magnetic phase diagrams for fields along the main crystalline axes are reported.
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Affiliation(s)
- S. Spachmann
- Kirchhoff Institute for Physics, Heidelberg University, D-69120 Heidelberg, Germany
| | - P. Berdonosov
- Lomonosov Moscow State University, Moscow, 119991 Russia
- National University of Science and Technology “MISiS”, Moscow, 119049 Russia
| | - M. Markina
- Lomonosov Moscow State University, Moscow, 119991 Russia
| | - A. Vasiliev
- Lomonosov Moscow State University, Moscow, 119991 Russia
- National University of Science and Technology “MISiS”, Moscow, 119049 Russia
| | - R. Klingeler
- Kirchhoff Institute for Physics, Heidelberg University, D-69120 Heidelberg, Germany
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130
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Haselmann U, Radlinger T, Pei W, Popov MN, Spitaler T, Romaner L, Ivanov YP, Chen J, He Y, Kothleitner G, Zhang Z. Ca Solubility in a BiFeO 3-Based System with a Secondary Bi 2O 3 Phase on a Nanoscale. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:7696-7703. [PMID: 35558823 PMCID: PMC9082603 DOI: 10.1021/acs.jpcc.2c00674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/02/2022] [Indexed: 06/15/2023]
Abstract
In BiFeO3 (BFO), Bi2O3 (BO) is a known secondary phase, which can appear under certain growth conditions. However, BO is not just an unwanted parasitic phase but can be used to create the super-tetragonal BFO phase in films on substrates, which would otherwise grow in the regular rhombohedral phase (R-phase). The super-tetragonal BFO phase has the advantage of a much larger ferroelectric polarization of 130-150 μC/cm2, which is around 1.5 times the value of the rhombohedral phase with 80-100 μC/cm2. Here, we report that the solubility of Ca, which is a common dopant of bismuth ferrite materials to tune their properties, is significantly lower in the secondary BO phase than in the observed R-phase BFO. Starting from the film growth, this leads to completely different Ca concentrations in the two phases. We show this with advanced analytical transmission electron microscopy techniques and confirm the experimental results with density functional theory (DFT) calculations. At the film's fabrication temperature, caused by different solubilities, about 50 times higher Ca concentration is expected in the BFO phase than in the secondary one. Depending on the cooling rate after fabrication, this can further increase since a larger Ca concentration difference is expected at lower temperatures. When fabricating functional devices using Ca doping and the secondary BO phase, the difference in solubility must be considered because, depending on the ratio of the BO phase, the Ca concentration in the BFO phase can become much higher than intended. This can be critical for the intended device functionality because the Ca concentration strongly influences and modifies the BFO properties.
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Affiliation(s)
- Ulrich Haselmann
- Erich
Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria
| | - Thomas Radlinger
- Institute
for Electron Microscopy and Nanoanalysis, Graz University of Technology, 8010 Graz, Austria
| | - Weijie Pei
- School
of Materials Science & Engineering, Hubei University, 430062 Wuhan, Hubei, China
| | - Maxim N. Popov
- Materials
Center Leoben Forschung GmbH, 8700 Leoben, Austria
| | - Tobias Spitaler
- Department
of Materials Science, Montanuniversität
Leoben, 8700 Leoben, Austria
| | - Lorenz Romaner
- Materials
Center Leoben Forschung GmbH, 8700 Leoben, Austria
- Department
of Materials Science, Montanuniversität
Leoben, 8700 Leoben, Austria
| | - Yurii P. Ivanov
- Department
of Materials Science & Metallurgy, University
of Cambridge, Cambridge CB3 0FS, U.K.
- School
of Natural Sciences, Far Eastern Federal University, 690950 Vladivostok, Russia
| | - Jian Chen
- School
of Materials Science & Engineering, Hubei University, 430062 Wuhan, Hubei, China
| | - Yunbin He
- School
of Materials Science & Engineering, Hubei University, 430062 Wuhan, Hubei, China
| | - Gerald Kothleitner
- Institute
for Electron Microscopy and Nanoanalysis, Graz University of Technology, 8010 Graz, Austria
- Graz
Centre for Electron Microscopy, Austrian Cooperative Research, 8010 Graz, Austria
| | - Zaoli Zhang
- Erich
Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria
- Institute
of Material Physics, Montanuniversität Leoben, 8700 Leoben, Austria
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131
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Qin R, Bhagurkar A. Effect of pulsating solidification on the surface properties of conductive materials. Proc Math Phys Eng Sci 2022; 478:20210726. [PMID: 35601961 PMCID: PMC9066606 DOI: 10.1098/rspa.2021.0726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 03/31/2022] [Indexed: 12/20/2022] Open
Abstract
Application of pulsed electric current to solidifying conductive materials leads to a rapid and significant reduction of surface roughness. This is validated experimentally in the present work for multi-component oxides. The surface geometry of the casts without and with pulsating treatment was measured using a Leica DCM-3D Profiler. The pulsating treatment reduces the roughness of solidified materials by more than 50%. The unmeasurable points, which account for nearly 2% of total area, were interpolated using an artificial multi-layer neural network. Both the experimentally measured and neural network interpolated surface profile data were implemented to the calculation of electric current free energy. The results show that the electric current free energy can overtake surface energy and provide a significant driving force to the kinetics of surface evolution in solidification. Distortion of the electric field is noticed around the interface.
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Affiliation(s)
- Rongshan Qin
- School of Engineering and Innovation, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
| | - Ashutosh Bhagurkar
- School of Engineering and Innovation, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
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132
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Jiang N, Bai Y, An H, Zhang H, Chen Y, He G, Zhao S. Sensitive angle-dependent magnetoelectric coupling in cluster-assembled flexible composites. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:265301. [PMID: 35413706 DOI: 10.1088/1361-648x/ac66b4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
Flexible magnetoelectric (ME) device is one of the indispensable elements. However, the complicated fabrication process and low sensitivity hinder the practical applications. Here, flexible NiFe anisotropic magnetoelastic composites were prepared by cluster-supersonic expansion method assistant with polyvinylidene fluoride (PVDF) substrates. The NiFe/PVDF composites possess sensitive angle-resolution ME coupling coefficient at room temperature, and the value can reach 0.66μV deg-1. The strong anisotropic magnetoelasticity phenomenon is reminiscent of the short-range ordered cluster structure. The anisotropic magnetoelastic coefficient can be deduced by temperature- and magnetic field strength-dependent anisotropic magnetoresistance. The magnetic torque results also prove the strong anisotropic magnetoelastic trait. The coupling between piezoelectricity and anisotropic magnetostrictive effect endows great possibilities toward flexible electronic compass. These results shed light on future in non-invasive tracking of vital biological health via wearable electronic devices.
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Affiliation(s)
- Ning Jiang
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yulong Bai
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Hengbin An
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Huatian Zhang
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yongquan Chen
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Guixin He
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Shifeng Zhao
- Inner Mongolia Key Lab of Nanoscience and Nanotechnology, & School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China
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133
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Zhu Y, Xia J, Wu S, Sun K, Yang Y, Zhao Y, Kan HW, Zhang Y, Wang L, Wang H, Fang J, Wang C, Wu T, Shi Y, Yu J, Zhang R, Li HF. Crystal growth engineering and origin of the weak ferromagnetism in antiferromagnetic matrix of orthochromates from t-e orbital hybridization. iScience 2022; 25:104111. [PMID: 35402887 PMCID: PMC8983379 DOI: 10.1016/j.isci.2022.104111] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/06/2022] [Accepted: 03/15/2022] [Indexed: 12/03/2022] Open
Abstract
We report a combined experimental and theoretical study on intriguing magnetic properties of quasiferroelectric orthochromates. Large single crystals of the family of RECrO3 (RE = Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) compounds were successfully grown. Neutron Laue study indicates a good quality of the obtained single crystals. Applied magnetic field and temperature dependent magnetization measurements reveal their intrinsic magnetic properties, especially the antiferromagnetic (AFM) transition temperatures. Density functional theory studies of the electronic structures were carried out using the Perdew-Burke-Ernzerhof functional plus Hubbard U method. Crystallographic information and magnetism were theoretically optimized systematically. When RE3+ cations vary from Y3+ and Eu3+ to Lu3+ ions, the calculated t-e orbital hybridization degree and Néel temperature behave similarly to the experimentally determined AFM transition temperature with variation in cationic radius. We found that the t-e hybridization is anisotropic, causing a magnetic anisotropy of Cr3+ sublattices. This was evaluated with the nearest-neighbor J1-J2 model. Our research provides a picture of the electronic structures during the t-e hybridization process while changing RE ions and sheds light on the nature of the weak ferromagnetism coexisting with predominated antiferromagnetism. The available large RECrO3 single crystals build a platform for further studies of orthochromates. The lack of large and good-quality single crystals of orthochromates has been solved Nature of the weak ferromagnetism in a main antiferromagnetic matrix has been revealed t-e orbital hybridization is the microscopic origin Relationship between microscopic and macroscopic properties has been correlated
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Affiliation(s)
- Yinghao Zhu
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao SAR 999078, China
- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Guangdong–Hong Kong–Macao Joint Laboratory for Neutron Scattering Science and Technology, No. 1. Zhongziyuan Road, Dalang, DongGuan 523803, China
| | - Junchao Xia
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao SAR 999078, China
- Guangdong–Hong Kong–Macao Joint Laboratory for Neutron Scattering Science and Technology, No. 1. Zhongziyuan Road, Dalang, DongGuan 523803, China
| | - Si Wu
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao SAR 999078, China
- Guangdong–Hong Kong–Macao Joint Laboratory for Neutron Scattering Science and Technology, No. 1. Zhongziyuan Road, Dalang, DongGuan 523803, China
| | - Kaitong Sun
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao SAR 999078, China
| | - Yuewen Yang
- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Yanling Zhao
- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Hei Wun Kan
- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
| | - Yang Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Ling Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Hui Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Jinghong Fang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Chaoyue Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Tong Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Yun Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Jianding Yu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Corresponding author
| | - Ruiqin Zhang
- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
- Corresponding author
| | - Hai-Feng Li
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao SAR 999078, China
- Corresponding author
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134
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Li H, Yang Y, Deng S, Zhang L, Cheng S, Guo EJ, Zhu T, Wang H, Wang J, Wu M, Gao P, Xiang H, Xing X, Chen J. Role of oxygen vacancies in colossal polarization in SmFeO 3-δ thin films. SCIENCE ADVANCES 2022; 8:eabm8550. [PMID: 35363530 PMCID: PMC10938629 DOI: 10.1126/sciadv.abm8550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
The orthorhombic rare-earth manganates and ferrites multiferroics are promising candidates for the next generation multistate spintronic devices. However, their ferroelectric polarization is small, and transition temperature is far below room temperature (RT). The improvement of ferroelectricity remains challenging. Here, through the subtle strain and defect engineering, an RT colossal polarization of 4.14 μC/cm2 is achieved in SmFeO3-δ films, which is two orders of magnitude larger than its bulk and is also the largest one among the orthorhombic rare-earth manganite and ferrite family. Meanwhile, its RT magnetism is uniformly distributed in the film. Combining the integrated differential phase-contrast imaging and density functional theory calculations, we reveal the origin of this superior ferroelectricity in which the purposely introduced oxygen vacancies in the Fe-O layer distorts the FeO6 octahedral cage and drives the Fe ion away from its high-symmetry position. The present approach can be applied to improve ferroelectric properties for multiferroics.
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Affiliation(s)
- Hao Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Yali Yang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai 200433, China
- Shanghai Qizhi Institution, Shanghai 200232, China
| | - Shiqing Deng
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
- Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Linxing Zhang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Sheng Cheng
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Er-Jia Guo
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Tao Zhu
- Spallation Neutron Source Science Center, Dongguan 523803, China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Huanhua Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jiaou Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Mei Wu
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Peng Gao
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Hongjun Xiang
- Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai 200433, China
- Shanghai Qizhi Institution, Shanghai 200232, China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Jun Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
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135
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Magnetic-Field-Tunable Intensity Transfer from Optically Active Phonons to Crystal-Field Excitations in the Reflection Spectra of the PrFe3(BO3)4 Antiferromagnet. CRYSTALS 2022. [DOI: 10.3390/cryst12030392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We analyze the field-dependent intensities of the coupled electron-phonon modes observed in the low-temperature far-infrared (terahertz) reflection spectra of PrFe3(BO3)4 and develop a theory based on the Green’s function approach. An excellent agreement between the experimental and theoretical data is achieved. The developed theory of the intensity transfer from phonons to quasi-electronic excitations can be applied to the electron-phonon modes in other compounds, in particular, in magnetodielectric materials, where it can be used to analyze the magnetodielectric response.
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136
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Song Q, Occhialini CA, Ergeçen E, Ilyas B, Amoroso D, Barone P, Kapeghian J, Watanabe K, Taniguchi T, Botana AS, Picozzi S, Gedik N, Comin R. Evidence for a single-layer van der Waals multiferroic. Nature 2022; 602:601-605. [PMID: 35197619 DOI: 10.1038/s41586-021-04337-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 12/10/2021] [Indexed: 11/09/2022]
Abstract
Multiferroic materials have attracted wide interest because of their exceptional static1-3 and dynamical4-6 magnetoelectric properties. In particular, type-II multiferroics exhibit an inversion-symmetry-breaking magnetic order that directly induces ferroelectric polarization through various mechanisms, such as the spin-current or the inverse Dzyaloshinskii-Moriya effect3,7. This intrinsic coupling between the magnetic and dipolar order parameters results in high-strength magnetoelectric effects3,8. Two-dimensional materials possessing such intrinsic multiferroic properties have been long sought for to enable the harnessing of magnetoelectric coupling in nanoelectronic devices1,9,10. Here we report the discovery of type-II multiferroic order in a single atomic layer of the transition-metal-based van der Waals material NiI2. The multiferroic state of NiI2 is characterized by a proper-screw spin helix with given handedness, which couples to the charge degrees of freedom to produce a chirality-controlled electrical polarization. We use circular dichroic Raman measurements to directly probe the magneto-chiral ground state and its electromagnon modes originating from dynamic magnetoelectric coupling. Combining birefringence and second-harmonic-generation measurements with theoretical modelling and simulations, we detect a highly anisotropic electronic state that simultaneously breaks three-fold rotational and inversion symmetry, and supports polar order. The evolution of the optical signatures as a function of temperature and layer number surprisingly reveals an ordered magnetic polar state that persists down to the ultrathin limit of monolayer NiI2. These observations establish NiI2 and transition metal dihalides as a new platform for studying emergent multiferroic phenomena, chiral magnetic textures and ferroelectricity in the two-dimensional limit.
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Affiliation(s)
- Qian Song
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.,Department of Material Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Connor A Occhialini
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Emre Ergeçen
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Batyr Ilyas
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Danila Amoroso
- Consiglio Nazionale delle Ricerche CNR-SPIN, c/o Università degli Studi 'G. D'Annunzio', Chieti, Italy.,NanoMat/Q-mat/CESAM, Université de Liège, Liège, Belgium
| | - Paolo Barone
- Consiglio Nazionale delle Ricerche CNR-SPIN, Area della Ricerca di Tor Vergata, Rome, Italy
| | - Jesse Kapeghian
- Department of Physics, Arizona State University, Tempe, AZ, USA
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
| | - Antia S Botana
- Department of Physics, Arizona State University, Tempe, AZ, USA
| | - Silvia Picozzi
- Consiglio Nazionale delle Ricerche CNR-SPIN, c/o Università degli Studi 'G. D'Annunzio', Chieti, Italy
| | - Nuh Gedik
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Riccardo Comin
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.
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137
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Ohkubo I, Mori T. Rational Design of 3d Transition-Metal Compounds for Thermoelectric Properties by Using Periodic Trends in Electron-Correlation Modulation. J Am Chem Soc 2022; 144:3590-3602. [PMID: 35170313 DOI: 10.1021/jacs.1c12520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic structures in solid-state transition-metal compounds can be represented by two parameters: the charge-transfer energy (Δ), which is the energy difference between the p-band of an anion and an upper Hubbard band contributed by transition-metal d-orbitals, and the onsite Coulomb repulsion energy (U), which represents the energy difference between lower and upper Hubbard bands composed of split d-orbitals in transition metals. These parameters can facilitate the classification of various types of electronic structures. In this study, the dependences of anion species (N3-, P3-, As3-, O2-, S2-, Se2-, Te2-, F-, Cl-, Br-, and I-) on Δ and U of 566 different binary and ternary 3d transition-metal compounds were investigated using ionic-model calculations. We were able to identify the systematic chemical trends in the variations in Δ and U values with the anion species of 11 different families of 3d transition-metal compounds in a comprehensive manner. The effective use of Δ-U diagrams given here, to facilitate the discovery and development of functional compounds, was demonstrated on thermoelectric compounds by classifying the thermoelectric properties of 3d transition-metal compounds and by predicting unrealized high-performance thermoelectric compounds.
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Affiliation(s)
- Isao Ohkubo
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Takao Mori
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.,Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
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138
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Sando D. Strain and orientation engineering in ABO 3perovskite oxide thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:153001. [PMID: 35042194 DOI: 10.1088/1361-648x/ac4c61] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Perovskite oxides with chemical formula ABO3are widely studied for their properties including ferroelectricity, magnetism, strongly correlated physics, optical effects, and superconductivity. A thriving research direction using such materials is through their integration as epitaxial thin films, allowing many novel and exotic effects to be discovered. The integration of the thin film on a single crystal substrate, however, can produce unique and powerful effects, and can even induce phases in the thin film that are not stable in bulk. The substrate imposed mechanical boundary conditions such as strain, crystallographic orientation, octahedral rotation patterns, and symmetry can also affect the functional properties of perovskite films. Here, the author reviews the current state of the art in epitaxial strain and orientation engineering in perovskite oxide thin films. The paper begins by introducing the effect of uniform conventional biaxial strain, and then moves to describe how the substrate crystallographic orientation can induce symmetry changes in the film materials. Various material case studies, including ferroelectrics, magnetically ordered materials, and nonlinear optical oxides are covered. The connectivity of the oxygen octahedra between film and substrate depending on the strain level as well as the crystallographic orientation is then discussed. The review concludes with open questions and suggestions worthy of the community's focus in the future.
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Affiliation(s)
- Daniel Sando
- School of Materials Science and Engineering, UNSW Sydney, Kensington, 2052, Australia
- ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET), UNSW Sydney, Kensington, 2052, Australia
- Mark Wainwright Analytical Centre, UNSW Sydney, Kensington, 2052, Australia
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139
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Visualizing rotation and reversal of the Néel vector through antiferromagnetic trichroism. Nat Commun 2022; 13:697. [PMID: 35121748 PMCID: PMC8816959 DOI: 10.1038/s41467-022-28215-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 01/10/2022] [Indexed: 11/10/2022] Open
Abstract
Conventional magnetic memories rely on bistable magnetic states, such as the up and down magnetization states in ferromagnets. Increasing the number of stable magnetic states in each cell, preferably composed of antiferromagnets without stray fields, promises to achieve higher-capacity memories. Thus far, such multi-stable antiferromagnetic states have been extensively studied in conducting systems. Here, we report on a striking optical response in the magnetoelectric collinear antiferromagnet Bi2CuO4, which is an insulating version of the representative spintronic material, CuMnAs, with four stable Néel vector orientations. We find that, due to a magnetoelectric effect in a visible range, which is enhanced by a peculiar local environment of Cu ions, absorption coefficient takes three discrete values depending on an angle between the propagation vector of light and the Néel vector—a phenomenon that we term antiferromagnetic trichroism. Furthermore, using this antiferromagnetic trichroism, we successfully visualize field-driven reversal and rotation of the Néel vector. Antiferromagnets have great promise for use in spin-based electronics; however, detecting the Neel vector is challenging due to the lack of a net magnetization. Here, Kimura et al demonstrate an intriguing optical response, where the optical absorption depends on the angle of the Neel vector.
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140
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Moore K, O’Connell EN, Griffin SM, Downing C, Colfer L, Schmidt M, Nicolosi V, Bangert U, Keeney L, Conroy M. Charged Domain Wall and Polar Vortex Topologies in a Room-Temperature Magnetoelectric Multiferroic Thin Film. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5525-5536. [PMID: 35044754 PMCID: PMC8815039 DOI: 10.1021/acsami.1c17383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
Multiferroic topologies are an emerging solution for future low-power magnetic nanoelectronics due to their combined tuneable functionality and mobility. Here, we show that in addition to being magnetoelectric multiferroic at room temperature, thin-film Aurivillius phase Bi6TixFeyMnzO18 is an ideal material platform for both domain wall and vortex topology-based nanoelectronic devices. Utilizing atomic-resolution electron microscopy, we reveal the presence and structure of 180°-type charged head-to-head and tail-to-tail domain walls passing throughout the thin film. Theoretical calculations confirm the subunit cell cation site preference and charged domain wall energetics for Bi6TixFeyMnzO18. Finally, we show that polar vortex-type topologies also form at out-of-phase boundaries of stacking faults when internal strain and electrostatic energy gradients are altered. This study could pave the way for controlled polar vortex topology formation via strain engineering in other multiferroic thin films. Moreover, these results confirm that the subunit cell topological features play an important role in controlling the charge and spin state of Aurivillius phase films and other multiferroic heterostructures.
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Affiliation(s)
- Kalani Moore
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Eoghan N. O’Connell
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Sinéad M. Griffin
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Clive Downing
- Advanced
Microscopy Laboratory & AMBER, Trinity
College Dublin, Dublin D02 PN40, Ireland
| | - Louise Colfer
- Tyndall
National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Michael Schmidt
- Tyndall
National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Valeria Nicolosi
- Advanced
Microscopy Laboratory & AMBER, Trinity
College Dublin, Dublin D02 PN40, Ireland
- School of
Chemistry, Trinity College Dublin, Dublin D02 PN40, Ireland
| | - Ursel Bangert
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
| | - Lynette Keeney
- Tyndall
National Institute, University College Cork, Cork T12 R5CP, Ireland
| | - Michele Conroy
- Department
of Physics, Bernal Institute, School of Natural Sciences, University of Limerick, Limerick V94 T9PX, Ireland
- Department
of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, U.K.
- London
Centre for Nanotechnology, Imperial College
London, Exhibition Road, London SW7 2AZ, U.K.
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141
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Yao X, Wang C, Guo EJ, Wang X, Li X, Liao L, Zhou Y, Lin S, Jin Q, Ge C, He M, Bai X, Gao P, Yang G, Jin KJ. Ferroelectric Proximity Effect and Topological Hall Effect in SrRuO 3/BiFeO 3 Multilayers. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6194-6202. [PMID: 35072446 DOI: 10.1021/acsami.1c21703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Interfaces between complex oxides provide a unique opportunity to discover novel interfacial physics and functionalities. Here, we fabricate the multilayers of itinerant ferromagnet SrRuO3 (SRO) and multiferroic BiFeO3 (BFO) with atomically sharp interfaces. Atomically resolved transmission electron microscopy reveals that a large ionic displacement in BFO can penetrate into SRO layers near the BFO/SRO interfaces to a depth of 2-3 unit cells, indicating the ferroelectric proximity effect. A topological Hall effect is indicated by hump-like anomalies in the Hall measurements of the multilayer with a moderate thickness of the SRO layer. With magnetic measurements, it can be further confirmed that each SRO layer in the multilayers can be divided into interfacial and middle regions, which possess different magnetic ground states. Our work highlights the key role of functional heterointerfaces in exotic properties and provides an important guideline to design spintronic devices based on magnetic skyrmions.
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Affiliation(s)
- Xiaokang Yao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Can Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Er-Jia Guo
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Xinyan Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaomei Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Lei Liao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Zhou
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shan Lin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiao Jin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chen Ge
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Peng Gao
- International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
| | - Guozhen Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kui-Juan Jin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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142
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Development of self-standing, lightweight and flexible polymer-cobalt ferrite nanocomposites for field sensor. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-02916-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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143
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Crystal Structure and Concentration-Driven Phase Transitions in Lu (1-x)Sc xFeO 3 (0 ≤ x ≤ 1) Prepared by the Sol-Gel Method. MATERIALS 2022; 15:ma15031048. [PMID: 35160993 PMCID: PMC8840425 DOI: 10.3390/ma15031048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 01/05/2023]
Abstract
The structural state and crystal structure of Lu(1−x)ScxFeO3 (0 ≤ x ≤ 1) compounds prepared by a chemical route based on a modified sol–gel method were investigated using X-ray diffraction, Raman spectroscopy, as well as scanning electron microscopy. It was observed that chemical doping with Sc ions led to a structural phase transition from the orthorhombic structure to the hexagonal structure via a wide two-phase concentration region of 0.1 < x < 0.45. An increase in scandium content above 80 mole% led to the stabilization of the non-perovskite bixbyite phase specific for the compound ScFeO3. The concentration stability of the different structural phases, as well as grain morphology, were studied depending on the chemical composition and synthesis conditions. Based on the data obtained for the analyzed samples, a composition-dependent phase diagram was constructed.
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144
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Chhillar S, Mukherjee K, Yadav CS. Large magnetodielectric coupling in the vicinity of metamagnetic transition in 6H -perovskite Ba 3GdRu 2O 9. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:145801. [PMID: 35016167 DOI: 10.1088/1361-648x/ac4a57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
The 6H-perovskites Ba3RRu2O9(R = rare earth element) demonstrate the magnetodielectric (MD) coupling as a manifestation of 4d-4fmagnetic interactions. Here, a detailed study of the structural, magnetic, heat capacity, and MD properties of the 6H-perovskite Ba3GdRu2O9is reported. The signature of long-range antiferromagnetic (AFM) ordering ∼14.8 K (TN) is evident from the magnetization and heat capacity studies. TheTNshifts towards the lower temperature side, apart from splitting in two with the application of the magnetic field. Field-dependent magnetization at 2 K shows three metamagnetic transitions with the opening of small hysteresis in different regions. A new transition atT1emerges after the onset of the first metamagnetic transition. Complex magnetic behavior is observed in different magnetic field regions whereas these field regions themselves vary with the temperature. Dielectric response recorded at zero and 80 kOe field exhibits the development of MD coupling well aboveTN. The MD coupling (∼4.5% at 10 K) is enhanced by 25% as compared to the Dy counterpart. Effect of complex magnetic behavior is also conveyed in the MD results where the maximum value of MD coupling is observed in the vicinity of 10 K (onset ofT1) and near the second metamagnetic transition. Our investigation suggests that both Gd and Ru moments align simultaneously atTN. Short-range magnetic ordering is possibly responsible for MD coupling aboveTN.
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Affiliation(s)
- S Chhillar
- School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Mandi-175075 (H.P.), India
| | - K Mukherjee
- School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Mandi-175075 (H.P.), India
| | - C S Yadav
- School of Basic Sciences, Indian Institute of Technology Mandi, Kamand, Mandi-175075 (H.P.), India
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145
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Cai Y, Zhu H, Shi Q, Cheng Y, Chang L, Huang W. Photothermal conversion of Ti 2O 3 film for tuning terahertz waves. iScience 2022; 25:103661. [PMID: 35036863 PMCID: PMC8753118 DOI: 10.1016/j.isci.2021.103661] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/08/2021] [Accepted: 12/16/2021] [Indexed: 11/27/2022] Open
Abstract
Dynamic tuning of terahertz (THz) wave is vital for the development of next generation THz devices. Utilization of solar energy for tuning THz waves is a promising, eco-friendly, and sustainable way to expand THz application scenarios. Ti2O3 with an ultranarrow bandgap of 0.1eV exhibits intriguing thermal-induced metal-insulator transition (MIT), and possesses excellent photothermal conversion efficiency. Herein, Ti2O3 film was fabricated by a two-step magnetron sputtering method, and exhibited an excellent photothermal conversion efficiency of 90.45% and demonstrated temperature-dependent THz transmission characteristics with a wideband at 0.1-1 THz. We supposed to combine photothermal conversion characteristics with temperature-dependent THz transmission properties of Ti2O3 film, which could introduce solar light as the energy source for tuning THz waves. Our work will provide new sight for investigating MIT characteristics of Ti2O3 at THz regime and exhibit huge potential in the application of tuning terahertz waves in outdoor scenarios in the future.
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Affiliation(s)
- Yu Cai
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Hongfu Zhu
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Qiwu Shi
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ye Cheng
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Lei Chang
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Wanxia Huang
- College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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146
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Horký M, Arregi JA, Patel SKK, Staňo M, Medapalli R, Caha O, Vojáček L, Horák M, Uhlíř V, Fullerton EE. Controlling the Metamagnetic Phase Transition in FeRh/MnRh Superlattices and Thin-Film Fe 50-xMn xRh 50 Alloys. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3568-3579. [PMID: 34995065 DOI: 10.1021/acsami.1c22460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Equiatomic and chemically ordered FeRh and MnRh compounds feature a first-order metamagnetic phase transition between antiferromagnetic and ferromagnetic order in the vicinity of room temperature, exhibiting interconnected structural, magnetic, and electronic order parameters. We show that these two alloys can be combined to form hybrid metamagnets in the form of sputter-deposited superlattices and alloys on single-crystalline MgO substrates. Despite being structurally different, the magnetic behavior of the alloys with substantial Mn content resembles that of the FeRh/MnRh superlattices in the ultrathin individual layer limit. For FeRh/MnRh superlattices, dissimilar lattice distortions of the constituent FeRh and MnRh layers at the antiferromagnetic-ferromagnetic transition cause double-step transitions during cooling, while the magnetization during the heating branch shows a smooth, continuous trend. For Fe50-xMnxRh50 alloy films, the substitution of Mn at the Fe sites introduces an effective tensile in-plane strain and magnetic frustration in the highly ordered epitaxial films, largely influencing the phase transition temperature TM (by more than 150 K). In addition, Mn acts as a surfactant, enabling the growth of continuous thin films at higher temperatures. Thus, the introduction of hybrid FeRh-MnRh systems with adjustable parameters provides a pathway for the realization of tunable spintronic devices based on magnetic phase transitions.
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Affiliation(s)
- Michal Horký
- CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czechia
| | - Jon Ander Arregi
- CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czechia
| | - Sheena K K Patel
- Center for Memory and Recording Research, University of California San Diego, La Jolla, California 92093-0401, United States
| | - Michal Staňo
- CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czechia
| | - Rajasekhar Medapalli
- Center for Memory and Recording Research, University of California San Diego, La Jolla, California 92093-0401, United States
| | - Ondřej Caha
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czechia
| | - Libor Vojáček
- Institute of Physical Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czechia
| | - Michal Horák
- CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czechia
| | - Vojtěch Uhlíř
- CEITEC BUT, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czechia
- Institute of Physical Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czechia
| | - Eric E Fullerton
- Center for Memory and Recording Research, University of California San Diego, La Jolla, California 92093-0401, United States
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147
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Ramesh R. Materials for a Sustainable Microelectronics Future: Electric Field Control of Magnetism with Multiferroics. J Indian Inst Sci 2022; 102:489-511. [PMID: 35035127 PMCID: PMC8749116 DOI: 10.1007/s41745-021-00277-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 11/23/2021] [Indexed: 11/30/2022]
Abstract
This article is written on behalf of many colleagues, collaborators, and researchers in the field of complex oxides as well as current and former students and postdocs who continue to enable and undertake cutting-edge research in the field of multiferroics, magnetoelectrics, and the pursuit of electric-field control of magnetism. What I present is something that is extremely exciting from both a fundamental science and applications perspective and has the potential to revolutionize our world, particularly from a sustainability perspective. To realize this potential will require numerous new innovations, both in the fundamental science arena as well as translating these scientific discoveries into real applications. Thus, this article will attempt to bridge the gap between fundamental materials physics and the actual manifestations of the physical concepts into real-life applications. I hope this article will help spur more translational research within the broad materials community.
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Affiliation(s)
- R Ramesh
- Department of Physics and Department of Materials Science and Engineering, University of California, Berkeley, USA.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, USA
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148
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Origin of Perovskite Multiferroicity and Magnetoelectric-Multiferroic Effects—The Role of Electronic Spin in Spontaneous Polarization of Crystals. MAGNETOCHEMISTRY 2022. [DOI: 10.3390/magnetochemistry8010009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In this semi-review paper, we show that the multiferroic properties of perovskite ABO3 crystals with B(dn), n > 0, centers are fully controlled by the influence of the electronic spin on the local dipolar instability that triggers the spontaneous polarization of the crystal. Contrary to the widespread statements, the multiferroicity of these crystals does not emerge due to the addition of unpaired electrons (carrying magnetic moments) to the spontaneously polarizing crystal; the spin states themselves are an important part of the local electronic structure that determines the very possibility of the spontaneous polarization. This conclusion emerges from vibronic theory, in which the ferroelectricity is due to the cooperative interaction of the local dipolar distortions induced by the pseudo-Jahn-Teller effect (PJTE). The latter requires sufficiently strong vibronic coupling between ground and excited electronic states with opposite parity but the same spin multiplicity. The detailed electronic structure of the octahedral [B(dn)O6] center in the molecular orbital presentation shows how this requirement plays into the dependence of the possible perovskite magnetic, ferroelectric, and multiferroic properties on the number of d electrons, provided the criterion of the PJTE is obeyed. Revealed in detail, the role of the electronic spin in all these properties and their combination opens novel possibilities for their manipulation by means of external perturbations and exploration. In particular, it is shown that by employing the well-known spin-crossover phenomenon, a series of novel effects become possible, including magnetic-ferroelectric (multiferroic) crossover with electric-multiferroic, magnetic-ferroelectric, and magneto-electric effects, some of which have already been observed experimentally.
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149
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Zhong G, An F, Qu K, Dong Y, Yang Z, Dai L, Xie S, Huang R, Luo Z, Li J. Highly Flexible Freestanding BaTiO 3 -CoFe 2 O 4 Heteroepitaxial Nanostructure Self-Assembled with Room-Temperature Multiferroicity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104213. [PMID: 34816590 DOI: 10.1002/smll.202104213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Multiferroics with simultaneous electric and magnetic orderings are highly desirable for sensing, actuation, data storage, and bio-inspired systems, yet developing flexible materials with robust multiferroic properties at room temperature is a long-term challenge. Utilizing water-soluble Sr3 Al2 O6 as a sacrificial layer, the authors have successfully self-assembled a freestanding BaTiO3 -CoFe2 O4 heteroepitaxial nanostructure via pulse laser deposition, and confirmed its epitaxial growth in both out-of-plane and in-plane directions, with highly ordered CoFe2 O4 nanopillars embedded in a single crystalline BaTiO3 matrix free of substrate constraint. The freestanding nanostructure enjoys super flexibility and mechanical integrity, not only capable of spontaneously curving into a roll, but can also be bent with a radius as small as 4.23 µm. Moreover, piezoelectricity and ferromagnetism are demonstrated at both microscopic and macroscopic scales, confirming its robust multiferroicity at room temperature. This work establishes an effective route for flexible multiferroic materials, which have the potential for various practical applications.
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Affiliation(s)
- Gaokuo Zhong
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Feng An
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Ke Qu
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Yongqi Dong
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Zhenzhong Yang
- Key Laboratory of Polar Materials and Devices, East China Normal University, Shanghai, Shanghai, 200241, China
| | - Liyufen Dai
- School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Shuhong Xie
- School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Rong Huang
- Key Laboratory of Polar Materials and Devices, East China Normal University, Shanghai, Shanghai, 200241, China
| | - Zhenlin Luo
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Jiangyu Li
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
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150
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Yin Y, Liu F, Mao X, Wang W. Multiferroic properties of Bi5.75R0.25Fe1.4Ni0.6Ti3O18 (R = Eu, Sm, Nd, Bi and La) ceramics. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2020.11.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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