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American Physical Society, Physical review B, 13(80)

DOI: 10.1103/physrevb.80.132403

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Scaling of spin relaxation and angular momentum dissipation in permalloy nanowires

Journal article published in 2009 by Thomas Arthur Moore, Mathias Kläui ORCID, Lutz Heyne, Philipp Möhrke, Dirk Backes ORCID, Jan Rhensius, Ulrich Rüdiger, Laura J. Heyderman, J.-U. Thiele, Georg Woltersdorf, Christian H. Back, A. Fraile Rodríguez, Arantxa Fraile Rodríguez, Frithjof Nolting ORCID, Tevfik Onur Mentes and other authors.
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This paper is available in a repository.

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Abstract

We study the relationship between the damping (α) and the nonadiabaticity of the spin transport (β) in permalloy nanowires. α 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, β due to spin relaxation is measured. We find that β scales with α 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.