Continuous Electrical Manipulation of Magnetic Anisotropy and Spin Flopping in van der Waals Ferromagnetic Devices

Ming Tang; Junwei Huang; Feng Qin; Kun Zhai; Toshiya Ideue; Zeya Li; Fanhao Meng; Anmin Nie; Linglu Wu; Xiangyu Bi; Caorong Zhang; Ling Zhou; Peng Chen; Caiyu Qiu; Peizhe Tang; Haijun Zhang; Xiangang Wan; Lin Wang; Zhongyuan Liu; Yongjun Tian; Yoshihiro Iwasa; Hongtao Yuan

arXiv · 2211.08909

Continuous Electrical Manipulation of Magnetic Anisotropy and Spin Flopping in van der Waals Ferromagnetic Devices

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Abstract

Controlling the magnetic anisotropy of ferromagnetic materials plays a key role in magnetic switching devices and spintronic applications. Examples of spin-orbit torque devices with different magnetic anisotropy geometries (in-plane or out-of-plane directions) have been demonstrated with novel magnetization switching mechanisms for extended device functionalities. Normally, the intrinsic magnetic anisotropy in ferromagnetic materials is unchanged within a fixed direction, and thus, it is difficult to realize multifunctionality devices. Therefore, continuous modulation of magnetic anisotropy in ferromagnetic materials is highly desired but remains challenging. Here, we demonstrate a gate-tunable magnetic anisotropy transition from out-of-plane to canted and finally to in-plane in layered Fe$_5$GeTe$_2$ by combining the measurements of the angle-dependent anomalous Hall effect and magneto-optical Kerr effect with quantitative Stoner-Wohlfarth analysis. The magnetic easy axis continuously rotates in a spin-flop pathway by gating or temperature modulation. Such observations offer a new avenue for exploring magnetization switching mechanisms and realizing new spintronic functionalities.

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Ming Tang, Junwei Huang, Feng Qin, Kun Zhai, Toshiya Ideue, Zeya Li, Fanhao Meng, Anmin Nie, Linglu Wu, Xiangyu Bi, Caorong Zhang, Ling Zhou, Peng Chen, Caiyu Qiu, Peizhe Tang, Haijun Zhang, Xiangang Wan, Lin Wang, Zhongyuan Liu, Yongjun Tian, Yoshihiro Iwasa, Hongtao Yuan. 2022-11-16. Continuous Electrical Manipulation of Magnetic Anisotropy and Spin Flopping in van der Waals Ferromagnetic Devices. https://arxiv.org/abs/2211.08909

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