Scaling of spin relaxation and angular momentum dissipation in permalloy nanowires

DOI: 10.1103/PhysRevB.80.132403

Authors: T. Moore (Universität Konstanz) , M. Klaui (Universität Konstanz) , L. Heyne (Universität Konstanz) , P. Mohrke (Universität Konstanz) , D. Backes (Universität Konstanz) , J. Rhensius (Universität Konstanz) , U. Rudiger (Universität Konstanz) , L. Heyderman (Paul Scherrer Institute) , J.-U. Thiele (Hitachi Global Storage Technologies) , G. Wolterstorf (Universität Regensburg) , C. Back (Universität Regensburg) , A. Fraile Rodriquez (Swiss Light Source, Paul Scherrer Institut) , F. Nolting (Swiss Light Source, Paul Scherrer Institut) , T. Mentes (Sincrotrone Trieste) , M. Nino (Sincrotrone Trieste) , A. Locatelli (Sincrotrone Trieste) , S. S. Dhesi (Diamond Light Source) , S. Cavill (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, Materials


Instruments: I06-Nanoscience (XPEEM)

Other Facilities: Elettra; Swiss Light Source

Added On: 20/01/2010 10:55

Discipline Tags:

Physics Magnetism Materials Science Nanoscience/Nanotechnology

Technical Tags:

Spectroscopy Circular Dichroism (CD) X-ray Magnetic Circular Dichroism (XMCD)