Theory of Domain Wall Dynamics under Current

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  • Tatara Gen
    Graduate School of Science and Engineering, Tokyo Metropolitan University PRESTO, Japan Science and Technology Agency
  • Kohno Hiroshi
    Graduate School of Engineering Science, Osaka University
  • Shibata Junya
    Kanagawa Institute of Technology

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Microscopic theory of domain wall dynamics under electric current is reviewed. Domain wall is treated as rigid and planar. The spin-transfer torque and forces on the wall are derived based on the s–d exchange interaction between localized spins and conduction electrons, treating non-adiabaticity expressed by the gauge field perturbatively. Effect of spin relaxation is also studied.

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