Spin-signal propagation in time-dependent noncollinear spin transport

Physics – Condensed Matter – Materials Science

Scientific paper

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7 pages, 4 figures

Scientific paper

Using a macroscopic analysis, we show that time-dependent noncollinear spin transport possesses a wavelike character. This leads to modifications of pure spin-diffusion dynamics and allows one to extract a finite spin-signal propagation velocity. We numerically study the dynamics of a pure spin current pumped into a nonmagnetic layer for precession frequencies ranging from GHz to THz.

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