標題: Magnetic vortex structures probed by magnetotransport in sub-micron permalloy disks
作者: Kuo, C. Y.
Chung, T. Y.
Hsu, S. Y.
電子物理學系
Department of Electrophysics
公開日期: 2010
摘要: We have successfully used magneto-transport measurement to study magnetization reversal of domain structure in single sub-micron magnetic disks of various sizes, 300nm <= diameter <= 5 mu m and 36nm <= thickness <= 48nm. The magnetoresistance (MR) resulted from the anisotropic magnetoresistance effect can reveals the magnetization reversal of a single disk as confirmed by the magnetic force microscopic results. For a fixed thickness, the remanent domain state can transits from the multi-domain to vortex states by decreasing the disk diameter. Here, the nucleation and annihilation fields of vortex core are determined from disk's hysteretic MR and analytically described by the micromagnetic LLG calculation incorporated with the "rigid" vortex model developed by Guslienko et al. under the consideration of magnetostatic, exchange, and Zeeman energies
URI: http://hdl.handle.net/11536/19736
http://dx.doi.org/10.1088/1742-6596/200/3/032037
ISSN: 1742-6588
DOI: 10.1088/1742-6596/200/3/032037
期刊: INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009)
Volume: 200
Appears in Collections:Conferences Paper


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