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Title: Resolving the controversy of a possible relationship between perpendicular magnetic anisotropy and the magnetic damping parameter

Abstract

We use broadband ferromagnetic resonance spectroscopy to systematically measure the Landau-Lifshitz damping parameter, perpendicular anisotropy, and the orbital moment asymmetry in Co{sub 90}Fe{sub 10}/Ni multilayers. No relationship is found between perpendicular magnetic anisotropy and the damping parameter in this material. However, inadequate accounting for inhomogeneous linewidth broadening, spin-pumping, and two-magnon scattering could give rise to an apparent relationship between anisotropy and damping. In contrast, the orbital-moment asymmetry and the perpendicular anisotropy are linearly proportional to each other. These results demonstrate a fundamental mechanism by which perpendicular anisotropy can be varied independently of the damping parameter.

Authors:
; ;  [1]
  1. National Institute of Standards and Technology, Electromagnetics Division, Boulder, Colorado 80305 (United States)
Publication Date:
OSTI Identifier:
22318005
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 6; Other Information: (c) 2014 U.S. Government; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; COBALT COMPOUNDS; DAMPING; FERROMAGNETIC RESONANCE; IRON COMPOUNDS; LAYERS; MAGNONS; NICKEL; SCATTERING; SPECTROSCOPY; SPIN

Citation Formats

Shaw, Justin M., Nembach, Hans T., and Silva, T. J.. Resolving the controversy of a possible relationship between perpendicular magnetic anisotropy and the magnetic damping parameter. United States: N. p., 2014. Web. doi:10.1063/1.4892532.
Shaw, Justin M., Nembach, Hans T., & Silva, T. J.. Resolving the controversy of a possible relationship between perpendicular magnetic anisotropy and the magnetic damping parameter. United States. doi:10.1063/1.4892532.
Shaw, Justin M., Nembach, Hans T., and Silva, T. J.. Mon . "Resolving the controversy of a possible relationship between perpendicular magnetic anisotropy and the magnetic damping parameter". United States. doi:10.1063/1.4892532.
@article{osti_22318005,
title = {Resolving the controversy of a possible relationship between perpendicular magnetic anisotropy and the magnetic damping parameter},
author = {Shaw, Justin M. and Nembach, Hans T. and Silva, T. J.},
abstractNote = {We use broadband ferromagnetic resonance spectroscopy to systematically measure the Landau-Lifshitz damping parameter, perpendicular anisotropy, and the orbital moment asymmetry in Co{sub 90}Fe{sub 10}/Ni multilayers. No relationship is found between perpendicular magnetic anisotropy and the damping parameter in this material. However, inadequate accounting for inhomogeneous linewidth broadening, spin-pumping, and two-magnon scattering could give rise to an apparent relationship between anisotropy and damping. In contrast, the orbital-moment asymmetry and the perpendicular anisotropy are linearly proportional to each other. These results demonstrate a fundamental mechanism by which perpendicular anisotropy can be varied independently of the damping parameter.},
doi = {10.1063/1.4892532},
journal = {Applied Physics Letters},
number = 6,
volume = 105,
place = {United States},
year = {Mon Aug 11 00:00:00 EDT 2014},
month = {Mon Aug 11 00:00:00 EDT 2014}
}