Magnetization switching mediated by Rashba field in ferromagnetic films with perpendicular anisotropy

Details Magnetization switching mediated by Rashba field in ferromagnetic films with perpendicular anisotropy Magnetization switching mediated by Rashba field in ferromagnetic films with perpendicular anisotropy

2012-01-17

arxiv.org/abs/1201.3505v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures

Scientific paper

As an alternative to conventional magnetic field, the effective spin-orbit field in transition metals, derived from the Rashba field experienced by itinerant electrons confined in a spatial inversion asymmetric plane through the s-d exchange interaction, is proposed for the manipulation of magnetization. Magnetization switching in ferromagnetic thin films with perpendicular magnetocrystalline anisotropy can be achieved by current induced spin-orbit field, with small in-plane magnetic field. Spin-orbit field induced by current pulses as short as 10 ps can initiate ultrafast magnetization switching effectively, with experimentally achievable current densities. The whole switching process completes in about 100 ps.

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