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Modulation of Spin–Orbit Torque from SrRuO 3 by Epitaxial‐Strain‐Induced Octahedral Rotation
Author(s) -
Zhou Jing,
Shu Xinyu,
Lin Weinan,
Shao Ding Fu,
Chen Shaohai,
Liu Liang,
Yang Ping,
Tsymbal Evgeny Y.,
Chen Jingsheng
Publication year - 2021
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.202007114
Subject(s) - materials science , spintronics , condensed matter physics , perovskite (structure) , ferromagnetism , epitaxy , spin (aerodynamics) , ferromagnetic resonance , nanotechnology , crystallography , physics , magnetic field , magnetization , chemistry , layer (electronics) , quantum mechanics , thermodynamics
Spin–orbit torque (SOT), which arises from the spin–orbit coupling of conduction electrons, is believed to be the key route for developing low‐power, high‐speed, and nonvolatile memory devices. Despite the theoretical prediction of pronounced Berry phase curvatures in certain transition‐metal perovskite oxides, which lead to considerable intrinsic spin Hall conductivity, SOT from this class of materials has rarely been reported until recently. Here, the SOT generated by epitaxial SrRuO 3 of three different crystal structures is systematically studied. The results of both spin‐torque ferromagnetic resonance and in‐plane harmonic Hall voltage measurements concurrently reveal that the intrinsic SOT efficiency of SrRuO 3 decreases when the epitaxial strain changes from tensile to compressive. The X‐ray diffraction data demonstrate a strong correlation between the magnitude of SOT and octahedral rotation around the in‐plane axes of SrRuO 3 , consistent with the theoretical prediction. This work offers new possibilities of tuning SOT with crystal structures and novel opportunities of integrating the unique properties of perovskite oxides with spintronic functionalities.