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Geometric size effect on the extrinsic Gilbert damping in laterally confined magnetic structures

Title
Geometric size effect on the extrinsic Gilbert damping in laterally confined magnetic structures
Authors
Song, Hyon-SeokLee, Kyeong-DongYou, Chun-YeolPark, Byong-GukHong, Jung-Il
DGIST Authors
Hong, Jung-Il
Issue Date
2016-05-15
Citation
Journal of Magnetism and Magnetic Materials, 406, 129-133
Type
Article
Article Type
Article
Keywords
Applied Magnetic FieldsDampingDamping ConstantsMagnetic DampingMagnetic FieldsMagnetismMicromagnetic SimulationsMumax3Patterned FilmPatterned FilmsPatterned Thin FilmsSimulationSpin DynamicsSpin WaveSpin Waves
ISSN
0304-8853
Abstract
We investigated spin dynamics in micron-length scale patterned thin films using the GPU-based micromagnetic simulation program. Spin precessional motion was induced by a Gaussian-pulse magnetic field. The effective Gilbert damping was examined by tracking the precessional motion of the spins, and we found that the damping constant depends on the size and shape of the pattern as well as the externally applied magnetic field. Additional extrinsic damping generated around the edge region was attributed to the dephasing effect between the fundamental spin wave and other spin wave modes. We find that the effect of extrinsic damping could be eliminated by proper adjustments of sample size, external bias field, position, and area of observation. © 2016 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5105
DOI
10.1016/j.jmmm.2016.01.006
Publisher
Elsevier B.V.
Related Researcher
  • Author Hong, Jung Il Quantum Electric & Magnetic Materials Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
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Collection:
Department of Emerging Materials ScienceQuantum Electric & Magnetic Materials Laboratory1. Journal Articles


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