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Strain‐Sensitive Magnetization Reversal of a van der Waals Magnet
Author(s) -
Wang Yu,
Wang Cong,
Liang ShiJun,
Ma Zecheng,
Xu Kang,
Liu Xiaowei,
Zhang Lili,
Admasu Alemayehu S.,
Cheong SangWook,
Wang Lizheng,
Chen Moyu,
Liu Zenglin,
Cheng Bin,
Ji Wei,
Miao Feng
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202004533
Subject(s) - materials science , condensed matter physics , van der waals force , magnet , magnetization , coercivity , phase diagram , magnetism , strain (injury) , anisotropy , magnetic anisotropy , magnetocrystalline anisotropy , magnetic field , phase (matter) , optics , physics , medicine , quantum mechanics , molecule
By virtue of the layered structure, van der Waals (vdW) magnets are sensitive to the lattice deformation controlled by the external strain, providing an ideal platform to explore the one‐step magnetization reversal that is still conceptual in conventional magnets due to the limited strain‐tuning range of the coercive field. In this study, a uniaxial tensile strain is applied to thin flakes of the vdW magnet Fe 3 GeTe 2 (FGT), and a dramatic increase of the coercive field ( H c ) by more than 150% with an applied strain of 0.32% is observed. Moreover, the change of the transition temperatures between the different magnetic phases under strain is investigated, and the phase diagram of FGT in the strain–temperature plane is obtained. Comparing the phase diagram with theoretical results, the strain‐tunable magnetism is attributed to the sensitive change of magnetic anisotropy energy. Remarkably, strain allows an ultrasensitive magnetization reversal to be achieved, which may promote the development of novel straintronic device applications.