Vortex polarity switching by a spin--polarized current
其他凝聚态物理
2009-11-11 v2
摘要
The spin-transfer effect is investigated for the vortex state of a magnetic nanodot. A spin current is shown to act similarly to an effective magnetic field perpendicular to the nanodot. Then a vortex with magnetization (polarity) parallel to the current polarization is energetically favorable. Following a simple energy analysis and using direct spin--lattice simulations, we predict the polarity switching of a vortex. For magnetic storage devices, an electric current is more effective to switch the polarity of a vortex in a nanodot than the magnetic field.
引用
@article{arxiv.cond-mat/0607362,
title = {Vortex polarity switching by a spin--polarized current},
author = {Jean-Guy Caputo and Yuri Gaididei and Franz G. Mertens and Denis D. Sheka},
journal= {arXiv preprint arXiv:cond-mat/0607362},
year = {2009}
}