926 research outputs found
Inverse Spin Hall Effect Driven by Spin Motive Force
The spin Hall effect is a phenomenon that an electric field induces a spin
Hall current. In this Letter, we examine the inverse effect that, in a
ferromagnetic conductor, a charge Hall current is induced by a spin motive
force, or a spin-dependent effective ` electric' field ,
arising from the time variation of magnetization texture. By considering
skew-scattering and side-jump processes due to spin-orbit interaction at
impurities, we obtain the Hall current density as , where is the local spin direction and
is the spin Hall conductivity. The Hall angle due to the spin
motive force is enhanced by a factor of compared to the conventional
anomalous Hall effect due to the ordinary electric field, where is the spin
polarization of the current. The Hall voltage is estimated for a field-driven
domain wall oscillation in a ferromagnetic nanowire.Comment: 4 pages, 3 figures, the title has been change
Domain wall displacement triggered by an AC current below threshold
It is theoretically demonstrated that a displacement of a pinned domain wall,
typically of order of m, can be driven by use of an ac current which is
below threshold value. The point here is that finite motion around the pinning
center by a low current is enhanced significantly by the resonance if the
frequency is tuned close to the pinning frequency as demonstrated by recent
experiment
Spin Hall Current and Spin-transfer Torque in Ferromagnetic Metal
We theoretically examine the spin-transfer torque in the presence of
spin-orbit interaction (SOI) at impurities in a ferromagnetic metal on the
basis of linear response theory. We obtained, in addition to the usual
spin-transfer torque, a new contributioin in the first order in SOI, where
is the spin Hall current driven by an
external electric field. This is a reaction to inverse spin Hall effect driven
by spin motive force in a ferromagnet.Comment: 4 pages, Proceedings of the International Conference on Magnetism,
submitted to J. Phys: Conference Serie
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