Current driven magnetization dynamics in helical spin density waves
Abstract
A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. In this paper, we show that a current through a bulk system with a helical spin density wave induces a spin transfer torque, giving rise to a rotation of the order parameter.The use of spin transfer torque to manipulate the magnetization in bulk systems does not suffer from the obstacles seen for magnetization reversal using interface spin transfer torque in multilayered systems. We demonstrate the effect by a quantitative calculation of the current induced magnetization dynamics of Erbium. Finally we propose a setup for experimental verification.
Keywords
Cite
@article{arxiv.cond-mat/0511224,
title = {Current driven magnetization dynamics in helical spin density waves},
author = {Ola Wessely and Bjorn Skubic and Lars Nordstrom},
journal= {arXiv preprint arXiv:cond-mat/0511224},
year = {2009}
}
Comments
In the previous version of this paper was a small numerical mistake made when evaluating equation 3 and 9. The number of digits given in the calculation of the torque current tensor is reduced to better represent the accuracy of the calculation. A slightly modified paper have been published in Phys. Rev. Lett. 96, 256601 (2006) 4 pages 3 figures