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Lee, Ki-Suk
Creative Lab. for Advanced Spin Systems (CLASS)
Research Interests
  • Magnetism, spintronics, spin dynamics, rare-earth free magnet

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Dynamic origin of vortex core switching in soft magnetic nanodots

Cited 103 times inthomson ciCited 67 times inthomson ci
Title
Dynamic origin of vortex core switching in soft magnetic nanodots
Author
Guslienko, Konstantin Yu.Lee, Ki-SukKim, Sang-Koog
Issue Date
2008-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.100, no.2, pp.1 - 4
Abstract
The magnetic vortex with in-plane curling magnetization and out-of-plane magnetization at the core is a unique ground state in nanoscale magnetic elements. This kind of magnetic vortex can be used, through its downward or upward core orientation, as a memory unit for information storage, and thus, controllable core switching deserves some special attention. Our analytical and micromagnetic calculations reveal that the origin of vortex core reversal is a gyrotropic field. This field is induced by vortex dynamic motion and is proportional to the velocity of the moving vortex. Our calculations elucidate the physical origin of the vortex core dynamic reversal, and, thereby, offer a key to effective manipulation of the vortex core orientation.
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DOI
10.1103/PhysRevLett.100.027203
ISSN
0031-9007
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MSE_Journal Papers
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