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 Fe₃GeTe₂ (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.

中文翻译：

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范德华磁铁的应变敏感磁化反转。

凭借分层结构，范德华（vdW）磁体对由外部应变控制的晶格变形敏感，从而为探索单步磁化反转提供了理想平台，由于有限的应变，单步磁化反转在常规磁体中仍然是概念性的矫顽场的调整范围。在这项研究中，将单轴拉伸应变应用于vdW磁体Fe ₃ GeTe ₂（FGT）的薄片，矫顽场（H _c）观察到超过150％的应变，施加的应变为0.32％。此外，研究了在应变下不同磁相之间的转变温度的变化，并获得了FGT在应变温度平面上的相图。将相图与理论结果进行比较，应变可调磁场归因于磁各向异性能的灵敏变化。显着地，应变允许实现超灵敏的磁化反转，这可以促进新型应变电子器件应用的发展。