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Current-induced transverse spin wave instability in a thin nanomagnet

M. L. Polianski, P. W. Brouwer

cond-mat.mes-hallarXiv:cond-mat/0304069

Abstract

We show that an unpolarized electric current incident perpendicular to the plane of a thin ferromagnet can excite a spin-wave instability transverse to the current direction if source and drain contacts are not symmetric. The instability, which is driven by the current-induced ``spin-transfer torque'', exists for one current direction only.

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