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Scaling of spin relaxation and angular momentum dissipation in permalloy nanowires

DOI: 10.1103/PhysRevB.80.132403 DOI Help

Authors: T. Moore (Fachbereich Physik, Universität Konstanz) , M. Klaui (Fachbereich Physik, Universität Konstanz) , L. Heyne (Fachbereich Physik, Universität Konstanz) , P. Mohrke (Fachbereich Physik, Universität Konstanz) , D. Backes (Fachbereich Physik, Universität Konstanz) , J. Rhensius (Fachbereich Physik, Universität Konstanz) , U. Rudiger (Fachbereich Physik, Universität Konstanz) , L. Heyderman (Paul Scherrer Institute) , J.-u. Thiele (Hitachi Global Storage Technologies, San Jose Research Center) , G. Wolterstorf (4Fakultät für Physik, Universität Regensburg) , C. Back (Fakultät für Physik, Universität Regensburg, Universitätsstrasse 31, 93040 Regensburg) , A. Fraile Rodriquez (Paul Scherrer Institut) , F. Nolting (Paul Scherrer Institut) , T. Mentes (Sincrotrone Trieste) , M. Nino (Sincrotrone Trieste) , A. Locatelli (Sincrotrone Trieste) , S. Dhesi (Diamond Light Source) , S. Cavill (University of York, Diamond Light Source) , H. Marchetto (Diamond Light Source) , A. Potenza (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 80 (13) , PAGES 132403

State: Published (Approved)
Published: October 2009

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.

Subject Areas: Physics


Instruments: I06-Nanoscience

Other Facilities: Elettra Synchrotron Light Source; Swiss Light Source