Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere

Klingler S, Maier-Flaig H, Dubs C, Surzhenko O, Gross R, Huebl H, Goennenwein STB, Weiler M (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 110

Article Number: 092409

Journal Issue: 9

DOI: 10.1063/1.4977423

Abstract

The magnetostatic mode (MSM) spectrum of a 300 μm diameter single crystalline sphere of yttrium iron garnet is investigated using broadband ferromagnetic resonance (FMR). The individual MSMs are identified via their characteristic dispersion relations, and the corresponding mode number tuples (nmr) are assigned. Taking FMR data over a broad frequency and magnetic field range allows one to analyze both the Gilbert damping parameter α and the inhomogeneous line broadening contribution to the total linewidth of the MSMs separately. The linewidth analysis shows that all MSMs share the same Gilbert damping parameter α = 2.7(5) × 10−5 irrespective of their mode index. In contrast, the inhomogeneous line broadening shows a pronounced mode dependence. This observation is modeled in terms of two-magnon scattering processes of the MSMs into the spin-wave manifold, mediated by surface and volume defects.

Involved external institutions

Bayerische Akademie der Wissenschaften DE Germany (DE) INNOVENT e. V. DE Germany (DE)

How to cite

APA:

Klingler, S., Maier-Flaig, H., Dubs, C., Surzhenko, O., Gross, R., Huebl, H.,... Weiler, M. (2017). Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere. Applied Physics Letters, 110(9). https://doi.org/10.1063/1.4977423

MLA:

Klingler, S., et al. "Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere." Applied Physics Letters 110.9 (2017).

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