Min, H.
, McMichael, R.
, Miltat, J.
and Stiles, M.
(2011),
Effects of disorder on magnetic vortex gyration, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906934
(Accessed December 22, 2024)
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Effects of disorder on magnetic vortex gyration
Published
Author(s)
Hongki Min, , Jacques Miltat,
Abstract
A vortex gyrating in a magnetic disc has two regimes of motion in the presence of disorder. At large amplitudes the vortex core moves quasi-freely through the disorder potential. As the amplitude decreases, the core can become pinned at a particular point in the potential and precess with a significantly increased frequency. In the pinned regime, the amplitude of the precession decreases more rapidly than in the quasi-free regime. In part, this decreased decay time is due to an increase in the effective damping constant and in part due to geometric distortion of the vortex. A simple model with a single pinning potential illustrates these two contributions.Citation
Physical Review B
Volume
83
Pub Type
Journals
Download Paper
Keywords
magnetic vortex, micromagnetics, gyration, magnetic damping, precession, Landau-Lifshitz-Gilbert
Citation
Issues
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Created February 14, 2011, Updated October 12, 2021