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Current-driven magnetization switching in a van der Waals ferromagnet Fe3GeTe2

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arxiv 1902.05794 v1 pith:Q7IBPJ6I submitted 2019-02-15 cond-mat.mes-hall

Xiao Wang , Jian Tang , Xiuxin Xia , Congli He , Junwei Zhang , Yizhou Liu , Caihua Wan , Chi Fang
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Chenyang Guo Wenlong Yang Yao Guang Xiaomin Zhang Hongjun Xu Jinwu Wei Mengzhou Liao Xiaobo Lu Jiafeng Feng Xiaoxi Li Yong Peng Hongxiang Wei Rong Yang Dongxia Shi Xixiang Zhang Zheng Han Zhidong Zhang Guangyu Zhang Guoqiang Yu Xiufeng Han
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classification cond-mat.mes-hall
keywords magnetizationfe3gete2spintronicswitchingeffectivelymagneticmaterialssots
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The recent discovery of ferromagnetism in two-dimensional (2D) van der Waals (vdW) materials holds promises for novel spintronic devices with exceptional performances. However, in order to utilize 2D vdW magnets for building spintronic nanodevices such as magnetic memories, key challenges remain in terms of effectively switching the magnetization from one state to the other electrically. Here, we devise a bilayer structure of Fe3GeTe2/Pt, in which the magnetization of few-layered Fe3GeTe2 can be effectively switched by the spin-orbit torques (SOTs) originated from the current flowing in the Pt layer. The effective magnetic fields corresponding to the SOTs are further quantitatively characterized using harmonic measurements. Our demonstration of the SOT-driven magnetization switching in a 2D vdW magnet could pave the way for implementing low-dimensional materials in the next-generation spintronic applications.

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  1. Lattice dynamics, phonon chirality and spin-phonon coupling in 2D itinerant ferromagnet Fe3GeTe2

    cond-mat.mes-hall 2019-09 conditional novelty 6.0 of 10

    Polarization-resolved Raman measurements on few-layer Fe3GeTe2 reveal two A1g modes and one chiral E2g mode, and temperature-dependent phonon anomalies that indicate spin-phonon coupling below the Curie temperature.

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