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

Published

Author(s)

Justin M. Shaw, Hans T. Nembach, Thomas J. Silva

Abstract

We use broadband ferromagnetic resonance spectroscopy to systematically measure the Landau- Lifshitz damping parameter, perpendicular anisotropy, and the orbital moment asymmetry in Co90Fe10/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.
Citation
Applied Physics Letters
Volume
105
Issue
6

Keywords

FERROMAGNETIC-RESONANCE LINEWIDTH, MAGNETOCRYSTALLINE ANISOTROPY, MICROSCOPIC ORIGIN, THIN- FILMS, MULTILAYERS, RELAXATION, SCATTERING, CONSTANT, METALS

Citation

Shaw, J. , Nembach, H. and Silva, T. (2014), Resolving the controversy of a possible relationship between perpendicular magnetic anisotropy and the magnetic damping parameter, Applied Physics Letters, [online], https://doi.org/10.1063/1.4892532 (Accessed June 14, 2024)

Issues

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Created August 13, 2014, Updated November 10, 2018