Surface current at non-magnetic metal/ferromagnetic insulator interface due to Rashba spin-orbit interaction

Abstract : We theoretically investigate a new mechanism of interfacial current in a two-layer system consisting of a magnetic insulator and an adjacent non-magnetic metal. The mechanism is based on Rashba spin-orbit interaction in the metal layer near the interface where the magnetic insulator induces non-zero magnetization. The rotation of the magnetization of the magnetic insulator induces the alternating interfacial current in the non-magnetic metal. Coordinate and time dependencies of the current and induced magnetization in the non-magnetic layer are calculated using quasi-energy approach assuming ballistic conductivity in non-magnetic metal. It is found that the current displays sizable magnitude within the metal layer over a distance which significantly exceeds a region with non-zero spin-orbit interaction. Both the current and the spin density induced in the metal layer demonstrate oscillatory dependence as a function of the distance from the interface due to the interference of the incoming and reflected waves.
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https://hal.archives-ouvertes.fr/hal-01578379
Contributor : Daria Gusakova <>
Submitted on : Tuesday, August 29, 2017 - 10:26:26 AM
Last modification on : Thursday, April 4, 2019 - 9:44:02 AM

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M. Zhuravlev, A. V. Vedyayev, M. Titova, N. V. Ryzhanova, Daria Gusakova. Surface current at non-magnetic metal/ferromagnetic insulator interface due to Rashba spin-orbit interaction. Journal of Magnetism and Magnetic Materials (JMMM), 2017, 441, pp.572. ⟨http://www.sciencedirect.com/science/article/pii/S0304885316331298⟩. ⟨10.1016/j.jmmm.2017.06.044⟩. ⟨hal-01578379⟩

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