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Bhattacharya S, Ohto T, Tada H, Saha SK. Interfacial negative magnetization in Ni encapsulated layer-tunable nested MoS 2 nanostructure with robust memory applications. NANOSCALE ADVANCES 2024; 6:1091-1105. [PMID: 38356617 PMCID: PMC10863702 DOI: 10.1039/d3na00343d] [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: 05/19/2023] [Accepted: 11/03/2023] [Indexed: 02/16/2024]
Abstract
Combining interfacial interactions and layer-number tunability, the evolution of magnetism in low-dimensional diamagnetic systems like MoS2 is indeed an interesting area of research. To explore this, Ni nanophases with an average size of 12 nm were encapsulated in MoS2 and the magnetization dynamics were studied over the temperature range of 2-300 K. Surprisingly, the newly formed hybrid nanostructure was found to have a negative magnetization state with giant exchange bias that showed a reversible temperature-induced increase in both spin magnetic moment and coercivity. Density functional theory calculations proved an interfacial charge transfer interaction with a spin-polarized density of states. The magnetization state, along with giant exchange correlation among the magnetic clusters, suggested the possibility of robust thermomagnetic memory. The dc magnetization and relaxation, investigated with different measurement protocols, unveiled robust thermoremanent magnetization as a memory effect. The time-dependent magnetization study indicated that contributions from the negative magnetization state along with charge transfer induced spin states are responsible for the memory effect, which can be controlled by both temperature and external field.
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Affiliation(s)
- Shatabda Bhattacharya
- School of Materials Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University Toyonaka 560-8531 Japan
| | - Tatsuhiko Ohto
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University Toyonaka 560-8531 Japan
| | - Hirokazu Tada
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University Toyonaka 560-8531 Japan
| | - Shyamal K Saha
- School of Materials Sciences, Indian Association for the Cultivation of Science Jadavpur Kolkata-700032 India
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Zhu B, Jiang J, Zhu T, Yang H, Jin Y, Choi KY, Lü M. Transition-Metal Monofluorophosphate Ba2M2(PO3F)F6 (M = Mn, Co, and Ni): Varied One-Dimensional Transition-Metal Chains and Antiferromagnetism. Inorg Chem 2020; 59:3794-3804. [DOI: 10.1021/acs.inorgchem.9b03458] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bei Zhu
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Jianhua Jiang
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Tianyu Zhu
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Haoming Yang
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Yong Jin
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Kwang-Yong Choi
- Department of Physics, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Minfeng Lü
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
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Zhang X, Li B, Cheng J, Chen X, Wang L, Miu Z, Song Z, Chi F, Liu S, Wang ZH. Weak ferromagnetic insulator with huge coercivity in monoclinic double perovskite La 2CuIrO 6. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:435601. [PMID: 31284271 DOI: 10.1088/1361-648x/ab2ff8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Insulating ferromagnets with high T C are required for many new magnetic devices. More complexity arises when strongly correlated 3d ions coexist with strongly spin-orbit coupled 5d ones in a double perovskite. Here, we perform the structural, magnetic, and density functional theory (DFT) study of such double perovskite La2CuIrO6. A new P21/n polymorph is found according to the comprehensive analysis of x-ray, Raman scattering and phonon spectrum. The magnetization reveals a weak ferromagnetic (FM) transition at T C = 62 K and short range FM order in higher temperature range. A huge coercivity is found as high as H C ~ 11.96 kOe at 10 K, which, in combination with the negative trapped field, results in the magnetization reversal in the zero field cooling measurement. The first principle calculations confirm the observed FM state and suggest La2CuIrO6 of this polymorph is a Mott insulating ferromagnet assisted by the spin-orbit coupling.
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Affiliation(s)
- Xingyu Zhang
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing, Jiangsu 210023, People's Republic of China
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Zhang L, Terada N, Johnson RD, Khalyavin DD, Manuel P, Katsuya Y, Tanaka M, Matsushita Y, Yamaura K, Belik AA. High-Pressure Synthesis, Structures, and Properties of Trivalent A-Site-Ordered Quadruple Perovskites RMn 7O 12 (R = Sm, Eu, Gd, and Tb). Inorg Chem 2018; 57:5987-5998. [PMID: 29722530 DOI: 10.1021/acs.inorgchem.8b00479] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A-site-ordered quadruple perovskites RMn7O12 with R = Sm, Eu, Gd, and Tb were synthesized at high pressure and high temperature (6 GPa and ∼1570 K), and their structural, magnetic, and dielectric properties are reported. They crystallize in space group I2/ m at room temperature. All four compounds exhibit a high-temperature phase transition to the cubic Im3̅ structure at ∼664 K (Sm), 663 K (Eu), 657 K (Gd), and 630 K (Tb). They all show one magnetic transition at TN1 ≈ 82-87 K at zero magnetic field, but additional magnetic transitions below TN2 ≈ 12 K were observed in SmMn7O12 and EuMn7O12 at high magnetic fields. Very weak kinklike dielectric anomalies were observed at TN1 in all compounds. We also observed pyroelectric current peaks near 14 K and frequency-dependent sharp steps in dielectric constant (near 18-35 K)-these anomalies are probably caused by dielectric relaxation, and they are not related to any ferroelectric transitions. TbMn7O12 shows signs of nonstoichiometry expressed as (Tb1- xMn x)Mn7O12, and these samples exhibit negative magnetization or magnetization reversal effects of an extrinsic origin on zero-field-cooled curves in intermediate temperature ranges. The crystal structures of SmMn7O12 and EuMn7O12 were refined from neutron powder diffraction data at 100 K, and the crystal structures of GdMn7O12 and (Tb0.88Mn0.12)Mn7O12 were studied by synchrotron X-ray powder diffraction at 295 K.
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Affiliation(s)
- Lei Zhang
- Research Center for Functional Materials , National Institute for Materials Science , Namiki 1-1 , Tsukuba, Ibaraki 305-0044 , Japan.,Graduate School of Chemical Sciences and Engineering , Hokkaido University , North 10 West 8, Kita-ku , Sapporo, Hokkaido 060-0810 , Japan
| | - Noriki Terada
- National Institute for Materials Science , Sengen 1-2-1 , Tsukuba, Ibaraki 305-0047 , Japan
| | - Roger D Johnson
- Department of Physics , University of Oxford, Clarendon Laboratory , Parks Road , Oxford OX1 3PU , United Kingdom
| | - Dmitry D Khalyavin
- ISIS Facility , Rutherford Appleton Laboratory , Chilton, Didcot OX11 0QX , United Kingdom
| | - Pascal Manuel
- ISIS Facility , Rutherford Appleton Laboratory , Chilton, Didcot OX11 0QX , United Kingdom
| | - Yoshio Katsuya
- Synchrotron X-ray Station at SPring-8 , National Institute for Materials Science , Kouto 1-1-1 , Sayo-cho, Hyogo 679-5148 , Japan
| | - Masahiko Tanaka
- Synchrotron X-ray Station at SPring-8 , National Institute for Materials Science , Kouto 1-1-1 , Sayo-cho, Hyogo 679-5148 , Japan
| | - Yoshitaka Matsushita
- National Institute for Materials Science , Sengen 1-2-1 , Tsukuba, Ibaraki 305-0047 , Japan
| | - Kazunari Yamaura
- Research Center for Functional Materials , National Institute for Materials Science , Namiki 1-1 , Tsukuba, Ibaraki 305-0044 , Japan.,Graduate School of Chemical Sciences and Engineering , Hokkaido University , North 10 West 8, Kita-ku , Sapporo, Hokkaido 060-0810 , Japan
| | - Alexei A Belik
- Research Center for Functional Materials , National Institute for Materials Science , Namiki 1-1 , Tsukuba, Ibaraki 305-0044 , Japan
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