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Scaling of spin relaxation and angular momentum dissipation in permalloy nanowires

Moore, T. A. and Klaeui, M. and Heyne, L. and Moehrke, P. and Backes, D. and Rhensius, J. and Ruediger, U. and Heyderman, L. J. and Thiele, J. -U. and Woltersdorf, Georg and Back, C. H. and Rodriguez, A. Fraile and Nolting, F. and Mentes, T. O. and Nino, M. A. and Locatelli, A. and Potenza, A. and Marchetto, H. and Cavill, S. and Dhesi, S. S. (2009) Scaling of spin relaxation and angular momentum dissipation in permalloy nanowires. Physical Review B (PRB) 80 (13).

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Abstract

We study the relationship between the damping (alpha) and the nonadiabaticity of the spin transport (beta) in permalloy nanowires.
alpha is engineered by Ho doping, and from the characteristics of the
current-induced domain-wall velocity, determined by high-resolution
x-ray magnetic circular-dichroism photoemission electron microscopy,
beta due to spin relaxation is measured. We find that beta scales with
alpha and conclude that the spin relaxation that leads to nonadiabatic
spin torque originates from the same underlying mechanism as the
angular momentum dissipation that causes viscous damping.

Item Type:	Article
Institutions:	Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back
Subjects:	500 Science > 530 Physics
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Partially
Owner:	Webmaster Back
Deposited On:	21 May 2010 08:24
Last Modified:	21 Jul 2011 00:28
Item ID:	14906

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