Magnetic properties in ultrathin transition-metal binary alloys. II. Experimental verification of quantitative theories of damping and spin pumping
- 7 April 2017
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 95 (13), 134411
- https://doi.org/10.1103/physrevb.95.134411
Abstract
A systematic experimental study of Gilbert damping is performed via ferromagnetic resonance for the disordered crystalline binary transition-metal alloys Ni-Co, Ni-Fe, and Co-Fe over the full range of alloy compositions. After accounting for inhomogeneous linewidth broadening, the damping shows clear evidence of both interfacial damping enhancement (by spin pumping) and radiative damping. We quantify these two extrinsic contributions and thereby determine the intrinsic damping. The comparison of the intrinsic damping to multiple theoretical calculations yields good qualitative and quantitative agreement in most cases. Furthermore, the values of the damping obtained in this study are in good agreement with a wide range of published experimental and theoretical values. Additionally, we find a compositional dependence of the spin mixing conductance.
Keywords
This publication has 65 references indexed in Scilit:
- Damping phenomena in Co90Fe10/Ni multilayers and alloysApplied Physics Letters, 2011
- Classics in Magnetics A Phenomenological Theory of Damping in Ferromagnetic MaterialsIEEE Transactions on Magnetics, 2004
- Theory of two magnon scattering microwave relaxation and ferromagnetic resonance linewidth in magnetic thin filmsJournal of Applied Physics, 1998
- Ferromagnetic resonance linewidth of Fe ultrathin films grown on a bcc Cu substrateJournal of Applied Physics, 1991
- Spin-wave measurements of exchange constantA in Ni-Fe alloy thin filmsPhysica Status Solidi (b), 1976
- Radiation damping in FMR measurements in a nonresonant rectangular waveguidephysica status solidi (a), 1976
- Radiation damping in magnetic resonance. II. Continuous-wave antiferromagnetic-resonance experimentsPhysical Review B, 1974
- Spin wave measurements of exchange constant in Ni-Fe alloy filmsIEEE Transactions on Magnetics, 1972
- Eddy current damping in thin metallic ferromagnetic filmsBritish Journal of Applied Physics, 1966
- Excitation of Spin Waves in Ferromagnets: Eddy Current and Boundary Condition EffectsPhysical Review B, 1960