Magnetization noise in magnetoelectronic nanostructures
Mesoscale and Nanoscale Physics
2009-11-11 v1
Abstract
By scattering theory we show that spin current noise in normal electric conductors in contact with nanoscale ferromagnets increases the magnetization noise by means of a fluctuating spin-transfer torque. Johnson-Nyquist noise in the spin current is related to the increased Gilbert damping due to spin pumping, in accordance with the fluctuation-dissipation theorem. Spin current shot noise in the presence of an applied bias is the dominant contribution to the magnetization noise at low temperatures.
Keywords
Cite
@article{arxiv.cond-mat/0501318,
title = {Magnetization noise in magnetoelectronic nanostructures},
author = {Jorn Foros and Arne Brataas and Yaroslav Tserkovnyak and Gerrit E. W. Bauer},
journal= {arXiv preprint arXiv:cond-mat/0501318},
year = {2009}
}
Comments
4 pages, 1 figure