Current induced Spin Torque in a nanomagnet
介观与纳米尺度物理
2009-11-10 v2 无序系统与神经网络
摘要
In a nanomagnet (whose total spin S< 1000), very small polarized currents can lead to magnetic reversal. Treating on the same footing the transport and magnetic properties of a nanomagnet connected to magnetic leads via tunneling barriers, we derive a closed equation for the time evolution of the magnetization. The interplay between Coulomb blockade phenomena and magnetism gives some additional structure to the current induced spin torque. In addition to the possibility of stabilizing uniform spin waves, we find that the system is highly hysteretic: up to three different magnetic states can be simultaneously stable in one region of the parameter (magnetic field and bias voltage) space.
引用
@article{arxiv.cond-mat/0411375,
title = {Current induced Spin Torque in a nanomagnet},
author = {X. Waintal and O. Parcollet},
journal= {arXiv preprint arXiv:cond-mat/0411375},
year = {2009}
}
备注
5 pages, 3 figures to appear in Phys. Rev. Lett