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Current-Induced Modulation of Coercive Field in the Ferromagnetic Oxide SrRuO 3

2019; IEEE Magnetics Society; Volume: 55; Issue: 7 Linguagem: Inglês

10.1109/tmag.2019.2894897

1941-0069

Michihiko Yamanouchi, Tatsuro Oyamada, Koichi Sato, Hiromichi Ohta, Jun’ichi Ieda,

Physics of Superconductivity and Magnetism

We investigated the coercive field H c for domain wall (DW) motion as a function of the current I in the ferromagnetic oxide SrRuO 3 , a model system with narrow DWs for fabricating high-density spintronics devices. The DW is moved by I in the direction of the current, and H c is modulated linearly in I. This linear relationship is consistent with an effective magnetic field H eff driving the DW. The direction of DW motion and the magnitude of H eff are well described by a model based on the field-like torque arising from the spin relaxation of conduction electrons in the DW.