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Chen X, Shen ZH, Liu RL, Shen Y, Liu HX, Chen LQ, Nan CW. Programming Polarity Heterogeneity of Energy Storage Dielectrics by Bidirectional Intelligent Design. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2311721. [PMID: 38224342 DOI: 10.1002/adma.202311721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/31/2023] [Indexed: 01/16/2024]
Abstract
Dielectric capacitors, characterized by ultra-high power densities, are considered as fundamental energy storage components in electronic and electrical systems. However, synergistically improving energy densities and efficiencies remains a daunting challenge. Understanding the role of polarity heterogeneity at the nanoscale in determining polarization response is crucial to the domain engineering of high-performance dielectrics. Here, a bidirectional design with phase-field simulation and machine learning is performed to forward reveal the structure-property relationship and reversely optimize polarity heterogeneity to improve energy storage performance. Taking BiFeO3-based dielectrics as typical systems, this work establishes the mapping diagrams of energy density and efficiency dependence on the volume fraction, size and configuration of polar regions. Assisted by CatBoost and Wolf Pack algorithms, this work analyzes the contributions of geometric factors and intrinsic features and find that nanopillar-like polar regions show great potential in achieving both high polarization intensity and fast dipole switching. Finally, a maximal energy density of 188 J cm-3 with efficiency above 95% at 8 MV cm-1 is obtained in BiFeO3-Al2O3 systems. This work provides a general method to study the influence of local polar heterogeneity on polarization behaviors and proposes effective strategies to enhance energy storage performance by tuning polarity heterogeneity.
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Affiliation(s)
- Xiaoxiao Chen
- International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
| | - Zhong-Hui Shen
- International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
| | - Run-Lin Liu
- International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
| | - Yang Shen
- School of Materials Science and Engineering, State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
| | - Han-Xing Liu
- International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
| | - Long-Qing Chen
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Ce-Wen Nan
- School of Materials Science and Engineering, State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
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2
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Han S, Bie J, Fa W, Chen S, Tang L, Guo W, Xu H, Ma Y, Liu Y, Liu X, Sun Z, Luo J. Field-Induced Antiferroelectric-Ferroelectric Transformation in Organometallic Perovskite Displaying Giant Negative Electrocaloric Effect. J Am Chem Soc 2024; 146:8298-8307. [PMID: 38498306 DOI: 10.1021/jacs.3c13422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Antiferroelectric materials with an electrocaloric effect (ECE) have been developed as promising candidates for solid-state refrigeration. Despite the great advances in positive ECE, reports on negative ECE remain quite scarce because of its elusive physical mechanism. Here, a giant negative ECE (maximum ΔS ∼ -33.3 J kg-1 K-1 with ΔT ∼ -11.7 K) is demonstrated near room temperature in organometallic perovskite, iBA2EA2Pb3I10 (1, where iBA = isobutylammonium and EA = ethylammonium), which is comparable to the greatest ECE effects reported so far. Moreover, the ECE efficiency ΔS/ΔE (∼1.85 J cm kg-1 K-1 kV-1) and ΔT/ΔE (∼0.65 K cm kV-1) are almost 2 orders of magnitude higher than those of classical inorganic ceramic ferroelectrics and organic polymers, such as BaTiO3, SrBi2Ta2O9, Hf1/2Zr1/2O2, and P(VDF-TrFE). As far as we know, this is the first report on negative ECE in organometallic hybrid perovskite ferroelectric. Our experimental measurement combined with the first-principles calculations reveals that electric field-induced antipolar to polar structural transformation results in a large change in dipolar ordering (from 6.5 to 45 μC/cm2 under the ΔE of 18 kV/cm) that is closely related to the entropy change, which plays a key role in generating such giant negative ECE. This discovery of field-induced negative ECE is unprecedented in organometallic perovskite, which sheds light on the exploration of next-generation refrigeration devices with high cooling efficiency.
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Affiliation(s)
- Shiguo Han
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- School of Chemistry & Chemical Engineering, Shandong University, Jinan 250100, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Jie Bie
- Kuang Yaming Honors School, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, P. R. China
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, P. R. China
| | - Wei Fa
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, P. R. China
| | - Shuang Chen
- Kuang Yaming Honors School, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Liwei Tang
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Wuqian Guo
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Haojie Xu
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Yu Ma
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Yi Liu
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Xitao Liu
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Zhihua Sun
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
| | - Junhua Luo
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
- School of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, P. R. China
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3
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Ding K, Ye H, Su C, Xiong YA, Du G, You YM, Zhang ZX, Dong S, Zhang Y, Fu DW. Superior ferroelectricity and nonlinear optical response in a hybrid germanium iodide hexagonal perovskite. Nat Commun 2023; 14:2863. [PMID: 37208340 DOI: 10.1038/s41467-023-38590-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 05/09/2023] [Indexed: 05/21/2023] Open
Abstract
Abundant chemical diversity and structural tunability make organic-inorganic hybrid perovskites (OIHPs) a rich ore for ferroelectrics. However, compared with their inorganic counterparts such as BaTiO3, their ferroelectric key properties, including large spontaneous polarization (Ps), low coercive field (Ec), and strong second harmonic generation (SHG) response, have long been great challenges, which hinder their commercial applications. Here, a quasi-one-dimensional OIHP DMAGeI3 (DMA = Dimethylamine) is reported, with notable ferroelectric attributes at room temperature: a large Ps of 24.14 μC/cm2 (on a par with BaTiO3), a low Ec below 2.2 kV/cm, and the strongest SHG intensity in OIHP family (about 12 times of KH2PO4 (KDP)). Revealed by the first-principles calculations, its large Ps originates from the synergistic effects of the stereochemically active 4s2 lone pair of Ge2+ and the ordering of organic cations, and its low kinetic energy barrier of small DMA cations results in a low Ec. Our work brings the comprehensive ferroelectric performances of OIHPs to a comparable level with commercial inorganic ferroelectric perovskites.
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Affiliation(s)
- Kun Ding
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, China
- Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321019, China
| | - Haoshen Ye
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, 211189, China
| | - Changyuan Su
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, China
| | - Yu-An Xiong
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, China
| | - Guowei Du
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, China
| | - Yu-Meng You
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, China
| | - Zhi-Xu Zhang
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, China.
- Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321019, China.
| | - Shuai Dong
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing, 211189, China.
| | - Yi Zhang
- Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321019, China.
| | - Da-Wei Fu
- Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321019, China.
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4
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Condurache O, Dražić G, Rojac T, Uršič H, Dkhil B, Bradeško A, Damjanovic D, Benčan A. Atomic-Level Response of the Domain Walls in Bismuth Ferrite in a Subcoercive-Field Regime. NANO LETTERS 2023; 23:750-756. [PMID: 36458590 PMCID: PMC9881151 DOI: 10.1021/acs.nanolett.2c02857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 11/18/2022] [Indexed: 06/17/2023]
Abstract
The atomic-level response of zigzag ferroelectric domain walls (DWs) was investigated with in situ bias scanning transmission electron microscopy (STEM) in a subcoercive-field regime. Atomic-level movement of a single DW was observed. Unexpectedly, the change in the position of the DW, determined from the atomic displacement, did not follow the position of the strain field when the electric field was applied. This can be explained as low mobility defect segregation at the initial DW position, such as ordered clusters of oxygen vacancies. Further, the triangular apex of the zigzag wall is pinned, but it changes its shape and becomes asymmetric under electrical stimuli. This phenomenon is accompanied by strain and bound charge redistribution. We report on unique atomic-scale phenomena at the DW level and show that in situ STEM studies with atomic resolution are very relevant as they complement, and sometimes challenge, the knowledge gained from lower resolution studies.
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Affiliation(s)
- Oana Condurache
- Electronic
Ceramics Department, Jožef Stefan
Institute, 1000 Ljubljana, Slovenia
- Jožef
Stefan International Postgraduate School, 1000 Ljubljana, Slovenia
| | - Goran Dražić
- Electronic
Ceramics Department, Jožef Stefan
Institute, 1000 Ljubljana, Slovenia
- Jožef
Stefan International Postgraduate School, 1000 Ljubljana, Slovenia
- National
Institute of Chemistry, 1001 Ljubljana, Slovenia
| | - Tadej Rojac
- Electronic
Ceramics Department, Jožef Stefan
Institute, 1000 Ljubljana, Slovenia
- Jožef
Stefan International Postgraduate School, 1000 Ljubljana, Slovenia
| | - Hana Uršič
- Electronic
Ceramics Department, Jožef Stefan
Institute, 1000 Ljubljana, Slovenia
- Jožef
Stefan International Postgraduate School, 1000 Ljubljana, Slovenia
| | - Brahim Dkhil
- CentraleSupélec,
Laboratoire Structures, Propriétés et Modélisation
des Solides, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Andraž Bradeško
- CentraleSupélec,
Laboratoire Structures, Propriétés et Modélisation
des Solides, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Dragan Damjanovic
- Institute
of Materials, Swiss Federal Institute of
Technology−EPFL, 1015 Lausanne, Switzerland
| | - Andreja Benčan
- Electronic
Ceramics Department, Jožef Stefan
Institute, 1000 Ljubljana, Slovenia
- Jožef
Stefan International Postgraduate School, 1000 Ljubljana, Slovenia
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5
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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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6
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Zabalo A, Stengel M. Switching a Polar Metal via Strain Gradients. PHYSICAL REVIEW LETTERS 2021; 126:127601. [PMID: 33834822 DOI: 10.1103/physrevlett.126.127601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 02/15/2021] [Indexed: 06/12/2023]
Abstract
Although rare, spontaneous breakdown of inversion symmetry sometimes occurs in a material which is metallic: these are commonly known as polar metals or ferroelectric metals. Their polarization, however, is difficult to switch via an electric field, which limits the experimental control over band topology. Here we investigate, via first-principles theory, flexoelectricity as a possible way around this obstacle with the well-known polar metal LiOsO_{3}. The flexocoupling coefficients are computed for this metal with high accuracy with an approach based on real-space sums of the interatomic force constants. A Landau-Ginzburg-Devonshire-type first-principles Hamiltonian is built and a critical bending radius to switch the material is estimated, whose order of magnitude is comparable to that of BaTiO_{3}.
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Affiliation(s)
- Asier Zabalo
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Massimiliano Stengel
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
- ICREA-Institució Catalana de Recerca i Estudis Avanats, 08010 Barcelona, Spain
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7
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Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering. Nat Commun 2018; 9:1813. [PMID: 29739938 PMCID: PMC5940880 DOI: 10.1038/s41467-018-04189-6] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 04/10/2018] [Indexed: 11/23/2022] Open
Abstract
Developing high-performance film dielectrics for capacitive energy storage has been a great challenge for modern electrical devices. Despite good results obtained in lead titanate-based dielectrics, lead-free alternatives are strongly desirable due to environmental concerns. Here we demonstrate that giant energy densities of ~70 J cm−3, together with high efficiency as well as excellent cycling and thermal stability, can be achieved in lead-free bismuth ferrite-strontium titanate solid-solution films through domain engineering. It is revealed that the incorporation of strontium titanate transforms the ferroelectric micro-domains of bismuth ferrite into highly-dynamic polar nano-regions, resulting in a ferroelectric to relaxor-ferroelectric transition with concurrently improved energy density and efficiency. Additionally, the introduction of strontium titanate greatly improves the electrical insulation and breakdown strength of the films by suppressing the formation of oxygen vacancies. This work opens up a feasible and propagable route, i.e., domain engineering, to systematically develop new lead-free dielectrics for energy storage. Dielectrics with high capacitive energy storage density are essential for modern electrical devices and pulsed power systems. Here, the authors realised superior energy storage performance in lead-free bismuth ferrite-based relaxor ferroelectric films through domain engineering.
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8
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Luo J, Sun W, Zhou Z, Bai Y, Wang ZJ, Tian G, Chen D, Gao X, Zhu F, Li JF. Domain Evolution and Piezoelectric Response across Thermotropic Phase Boundary in (K,Na)NbO 3-Based Epitaxial Thin Films. ACS APPLIED MATERIALS & INTERFACES 2017; 9:13315-13322. [PMID: 28368096 DOI: 10.1021/acsami.7b02263] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recent research progress in (K,Na)NbO3 (KNN)-based lead-free piezoelectric ceramics has attracted increasing attention for their applications to microsystems or microelectromechanical systems (MEMS) in the form of thin films. This work demonstrates that high-quality KNN-based epitaxial films can be synthesized by a conventional sol-gel method, whose phase structure and domain characteristics have been investigated with emphasis on the temperature effect. A monoclinic MC structure is observed at room temperature in KNN-based epitaxial films, which is close to but different from the orthorhombic phase in bulk counterparts. Piezoresponse force microscopy (PFM) at elevated temperatures reveals continuous changes of ferroelectric domains in KNN films during heating and cooling cycles between room temperature and 190 °C. A distinct change in domain morphology is observed upon heating to 110 °C, accompanied by a clear variation of dielectric permittivity suggesting a thermotropic phase transition, which is revealed to belong to a MC-MA phase transition on the basis of structural and PFM analysis on local ferroelectric and piezoelectric behaviors. Enhanced piezoelectric response at the thermotropic phase boundary is observed, which is attributed to active domains and/or nanodomains formed across the boundary. Domain engineering by utilizing the phase transition should be important and effective in KNN-based films not only for property enhancement but also for its textured ceramics.
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Affiliation(s)
- Jin Luo
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China
| | - Wei Sun
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China
| | - Zhen Zhou
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China
| | - Yu Bai
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
| | - Zhan Jie Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , Shenyang 110016, China
| | - Guo Tian
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Deyang Chen
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Xingsen Gao
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Fangyuan Zhu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences , No. 239 Zhangheng Road, Pu-dong District, Shanghai 201204, China
| | - Jing-Feng Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China
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9
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Divya S, Hemalatha J. Study on the enhancement of ferroelectric β phase in P(VDF-HFP) films under heating and poling conditions. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Yang T, Zhang X, Chen B, Guo H, Jin K, Wu X, Gao X, Li Z, Wang C, Li X. The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO 3 Thin Film. ACS APPLIED MATERIALS & INTERFACES 2017; 9:5600-5606. [PMID: 28097864 DOI: 10.1021/acsami.6b15162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, the surface structure of a single-domain epitaxial BiFeO3 film with (111) orientation was investigated by in situ grazing incidence X-ray diffraction and X-ray reflectivity. We found that a large strain gradient exists in the surface region (2-3 nm) of the BiFeO3 film. The strain gradient is approximately 107 m-1, which is 2 or 3 orders of magnitude larger than the value inside the film. Moreover, we found that a surface layer with a lower electron density compared with the underlying BiFeO3 layer exists on the surface of BiFeO3 film, and this layer exhibits an irreversible surface structure transition occurs at 500 K, which should be associated with the surface flexoelectric field. We considered that this large strain gradient is originated from the surface depolarization field of ferroelectrics. Our results suggest a coupling between the surface structure and the flexoelectricity and imply that the surface layer and properties would be controlled by the strain gradient in ferroelectric films.
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Affiliation(s)
- Tieying Yang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai, 201204, China
| | - Xingmin Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai, 201204, China
| | - Bin Chen
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo, 315201, China
| | - Haizhong Guo
- Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, China
| | - Kuijuan Jin
- Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, China
| | - Xiaoshan Wu
- Department of Physics, Nanjing University , Nanjing, 210093, China
| | - Xingyu Gao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai, 201204, China
| | - Zhong Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai, 201204, China
| | - Can Wang
- Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, China
| | - Xiaolong Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai, 201204, China
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11
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Li C, Wang L, Wang Z, Yang Y, Ren W, Yang G. Atomic Resolution Interfacial Structure of Lead-free Ferroelectric K 0.5Na 0.5NbO 3 Thin films Deposited on SrTiO 3. Sci Rep 2016; 6:37788. [PMID: 27886259 PMCID: PMC5122904 DOI: 10.1038/srep37788] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 10/28/2016] [Indexed: 11/22/2022] Open
Abstract
Oxide interface engineering has attracted considerable attention since the discovery of its exotic properties induced by lattice strain, dislocation and composition change at the interface. In this paper, the atomic resolution structure and composition of the interface between the lead-free piezoelectric (K0.5Na0.5)NbO3 (KNN) thin films and single-crystalline SrTiO3 substrate were investigated by means of scanning transmission electron microscopy (STEM) combining with electron energy loss spectroscopy (EELS). A sharp epitaxial interface was observed to be a monolayer composed of Nb and Ti cations with a ratio of 3/1. The First-Principles Calculations indicated the interface monolayer showed different electronic structure and played the vital role in the asymmetric charge distribution of KNN thin films near the interface. We also observed the gradual relaxation process for the relatively large lattice strains near the KNN/STO interface, which remarks a good structure modulation behavior of KNN thin films via strain engineering.
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Affiliation(s)
- Chao Li
- Electronic Materials Research Laboratory, Key Laboratory of The Ministry of Education&International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, China
| | - Lingyan Wang
- Electronic Materials Research Laboratory, Key Laboratory of The Ministry of Education&International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, China
| | - Zhao Wang
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - Yaodong Yang
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - Wei Ren
- Electronic Materials Research Laboratory, Key Laboratory of The Ministry of Education&International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, China
| | - Guang Yang
- Electronic Materials Research Laboratory, Key Laboratory of The Ministry of Education&International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, China
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12
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Lu Z, Fan Z, Li P, Fan H, Tian G, Song X, Li Z, Zhao L, Huang K, Zhang F, Zhang Z, Zeng M, Gao X, Feng J, Wan J, Liu J. Ferroelectric Resistive Switching in High-Density Nanocapacitor Arrays Based on BiFeO3 Ultrathin Films and Ordered Pt Nanoelectrodes. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23963-23968. [PMID: 27523723 DOI: 10.1021/acsami.6b07792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Ferroelectric resistive switching (RS), manifested as a switchable ferroelectric diode effect, was observed in well-ordered and high-density nanocapacitor arrays based on continuous BiFeO3 (BFO) ultrathin films and isolated Pt nanonelectrodes. The thickness of BFO films and the lateral dimension of Pt electrodes were aggressively scaled down to <10 nm and ∼60 nm, respectively, representing an ultrahigh ferroelectric memory density of ∼100 Gbit/inch(2). Moreover, the RS behavior in those nanocapacitors showed a large ON/OFF ratio (above 10(3)) and a long retention time of over 6,000 s. Our results not only demonstrate for the first time that the switchable ferroelectric diode effect could be realized in BFO films down to <10 nm in thickness, but also suggest the great potentials of those nanocapacitors for applications in high-density data storage.
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Affiliation(s)
- Zengxing Lu
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
- Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, China
| | - Zhen Fan
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Peilian Li
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Hua Fan
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Guo Tian
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Xiao Song
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Zhongwen Li
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Lina Zhao
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Kangrong Huang
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Fengyuan Zhang
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Zhang Zhang
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Min Zeng
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Xingsen Gao
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Jiajun Feng
- Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, China
| | - Jianguo Wan
- Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, China
| | - Junming Liu
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
- Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, China
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13
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Liu S, Grinberg I, Rappe AM. Intrinsic ferroelectric switching from first principles. Nature 2016; 534:360-3. [DOI: 10.1038/nature18286] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/13/2016] [Indexed: 12/23/2022]
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14
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Zhu H, Sun X, Kang L, Zhang Y, Yu Z, Ouyang J, Pan W. Microstructural and electrical characteristics of epitaxial BiFeO3thick films sputtered at different Ar/O2flow ratios. CrystEngComm 2016. [DOI: 10.1039/c6ce00781c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Bretos I, Jiménez R, Pérez-Mezcua D, Salazar N, Ricote J, Calzada ML. Low-temperature liquid precursors of crystalline metal oxides assisted by heterogeneous photocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2608-2613. [PMID: 25776728 DOI: 10.1002/adma.201405857] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 02/19/2015] [Indexed: 06/04/2023]
Abstract
The photocatalytically assisted decomposition of liquid precursors of metal oxides incorporating TiO2 particles enables the preparation of functional layers from the ferroelectric Pb(Zr,Ti)O3 and multiferroic BiFeO3 perovskite systems at temperatures not exceeding 350 ºC. This enables direct deposition on flexible plastic, where the multifunctionality provided by these complex-oxide materials guarantees their potential use in next-generation flexible electronics.
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Affiliation(s)
- Iñigo Bretos
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, Cantoblanco, Madrid, 28049, Spain
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16
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Yang CH, Kan D, Takeuchi I, Nagarajan V, Seidel J. Doping BiFeO3: approaches and enhanced functionality. Phys Chem Chem Phys 2014; 14:15953-62. [PMID: 23108014 DOI: 10.1039/c2cp43082g] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BiFeO(3) is one of the most studied multiferroic materials. Both its magnetic and ferroelectric properties can be influenced by doping. A large body of work on the doped material has been presented in the past couple of years. In this paper we provide a perspective on general doping concepts and their impact on the material's functionality.
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Affiliation(s)
- Chan-Ho Yang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
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17
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Feng K, Wang LC, Lu J, Wu Y, Shen BG. Experimentally determining the intrinsic center point of Bi2O3–Fe2O3 phase diagram for growing pure BiFeO3 crystals. CrystEngComm 2013. [DOI: 10.1039/c3ce40473k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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