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.
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27 February 2017
Research Article|
March 01 2017
Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere
S. Klingler;
S. Klingler
a)
1
Walther-Meißner-Institut
, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
2Physik-Department,
Technische Universität München
, 85748 Garching, Germany
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H. Maier-Flaig
;
H. Maier-Flaig
1
Walther-Meißner-Institut
, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
2Physik-Department,
Technische Universität München
, 85748 Garching, Germany
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C. Dubs
;
C. Dubs
3
INNOVENT e.V. Technologieentwicklung
, 07745 Jena, Germany
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O. Surzhenko;
O. Surzhenko
3
INNOVENT e.V. Technologieentwicklung
, 07745 Jena, Germany
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R. Gross;
R. Gross
1
Walther-Meißner-Institut
, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
2Physik-Department,
Technische Universität München
, 85748 Garching, Germany
4
Nanosystems Initiative Munich
, 80799 Munich, Germany
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H. Huebl;
H. Huebl
1
Walther-Meißner-Institut
, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
2Physik-Department,
Technische Universität München
, 85748 Garching, Germany
4
Nanosystems Initiative Munich
, 80799 Munich, Germany
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S. T. B. Goennenwein;
S. T. B. Goennenwein
1
Walther-Meißner-Institut
, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
5Institut für Festkörperphysik,
Technische Universität Dresden
, 01062 Dresden, Germany
6Center for Transport and Devices of Emergent Materials,
Technische Universität Dresden
, 01062 Dresden, Germany
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M. Weiler
M. Weiler
1
Walther-Meißner-Institut
, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
2Physik-Department,
Technische Universität München
, 85748 Garching, Germany
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a)
Electronic mail: stefan.klingler@wmi.badw.de
Appl. Phys. Lett. 110, 092409 (2017)
Article history
Received:
December 07 2016
Accepted:
February 11 2017
Citation
S. Klingler, H. Maier-Flaig, C. Dubs, O. Surzhenko, R. Gross, H. Huebl, S. T. B. Goennenwein, M. Weiler; Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere. Appl. Phys. Lett. 27 February 2017; 110 (9): 092409. https://doi.org/10.1063/1.4977423
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