Quantized spin waves and perpendicular standing spin waves stimulated by current in a single-layered ferromagnetic wire

Details Quantized spin waves and perpendicular standing spin waves stimulated by current in a single-layered ferromagnetic wire Quantized spin waves and perpendicular standing spin waves stimulated by current in a single-layered ferromagnetic wire

2008-03-29

arxiv.org/abs/0803.4271v1

Physics

Condensed Matter

Materials Science

19 pages, 4 figures

Scientific paper

The rectifying effect of radio-frequency (RF) current is highly sensitive in terms of the spatial spin distribution and dynamics. It emerged that an additional spin wave mode was stimulated by the direct-current (DC) current and that this spin wave was detectable via rectification of the RF current. A phenomenological model to describe the time-dependent anisotropic magnetoresistance or time-dependent planer Hall effect is proposed and found to correlate well to the experimental results. The nonlinear spin dynamics accompanying additional spin waves are studied as functions of the RF and DC currents, the external magnetic field, and the applied field direction.

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