Koerner, H. S. and Schoen, M. A. W. and Mayer, T. and Decker, M. M. and Stigloher, J. and Weindler, T. and Meier, T. N. G. and Kronseder, M. and Back, C. H. (2017) Magnetic damping in poly-crystalline Co25Fe75: Ferromagnetic resonance vs. spin wave propagation experiments. APPLIED PHYSICS LETTERS, 111 (13): 132406. ISSN 0003-6951, 1077-3118
Full text not available from this repository. (Request a copy)Abstract
We report on the investigation of the magnetic damping of a 10 nm thin, poly-crystalline Co25Fe75 film grown by molecular beam epitaxy. Ferromagnetic resonance (FMR) measurements reveal a low intrinsic magnetic damping alpha(FMR)(int) = (1.5+/-0.1) x 10(-3). In contrast, in patterned micrometer wide stripes, spin wave (SW) propagation experiments performed by time resolved scanning magneto-optical Kerr microscopy yield attenuation lengths on the order of 5-8 mu m. From this quantity, we deduce an effective magnetic SW damping alpha(SW,exp)(eff) = (3.9+/-0.3) x 10(-3). For the system studied, this significant difference between both damping parameters is attributed to the non-negligible extrinsic contributions (local inhomogeneities and two-magnon scattering) to the magnetic losses which manifest themselves as a distinct inhomogeneous FMR linewidth broadening. This explanation is supported by micromagnetic simulations. Our findings prove that poly-crystalline Co25Fe75 represents a promising binary 3d transition metal alloy to be employed in magnonic devices with much longer SW attenuation lengths compared to other metallic systems. Published by AIP Publishing.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FILM; |
| 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: | 14 Dec 2018 13:20 |
| Last Modified: | 27 Feb 2019 10:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2163 |
Actions (login required)
 |
View Item |
