Current-induced transverse spin wave instability in a thin nanomagnet
arXiv:cond-mat/0304069 · doi:10.1103/PhysRevLett.92.026602
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.
4 pages, 2 figures