Schoen, Martin A. W. and Shaw, Justin M. and Nembach, Hans T. and Weiler, Mathias and Silva, T. J. (2015) Radiative damping in waveguide-based ferromagnetic resonance measured via analysis of perpendicular standing spin waves in sputtered permalloy films. PHYSICAL REVIEW B, 92 (18): 184417. ISSN 1098-0121, 1550-235X
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The damping a of the spin-wave resonances in 75, 120, and 200 nm thick permalloy films is measured via vector-network-analyzer ferromagnetic resonance (VNA-FMR) in the out-of-plane geometry. Inductive coupling between the sample and the waveguide leads to an additional radiative damping term. The radiative contribution to the over-all damping is determined by measuring perpendicular standing spin waves (PSSWs) in the permalloy films, and the results are compared to a simple analytical model. The damping of the PSSWs can be fully explained by three contributions to the damping: the intrinsic damping, the eddy-current damping, and the radiative damping. It was not necessary to invoke any additional damping contributions to explain the data. Furthermore, a method to determine the radiative damping in FMR measurements with a single resonance is suggested.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SURFACE ANISOTROPY; BOUNDARY CONDITION; EDDY CURRENT; FREQUENCY; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 May 2019 08:37 |
| Last Modified: | 07 May 2019 08:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4449 |
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