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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/18519

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/18519

Title:	Nonuniform Magnetization Reversals in Elliptical Permalloy Dots
Authors:	Lai, Mei-Feng;Wei, Zung-Hang;Chang, Ching-Ray;Usov, N. A.;Wu, Jong-Ching;Lai, Jun-Yang
Contributors:	物理學系
Keywords:	Micromagnetic simulation;Stoner-Wohlfarth model;Magnetization reversal
Date:	2004-11
Issue Date:	2014-06-06T07:18:08Z
Publisher:	Elsevier
Abstract:	Reversible and irreversible magnetization processes of the single-domain elliptical permalloy dot are studied by simulation. The magnetization curve of the reversible process obtained by applying the field along the hard axis of the elliptical dot is almost linear, as is the case in the single-domain ellipsoidal particle. Due to the occurrence of the non uniform reversal, the switching field is reduced significantly compared to that predicted by the Stoner–Wohlfarth model. The nucleation fields of elliptical dots are calculated as a function of ellipse's aspect ratio, and the function reveals a step-like behavior.
Relation:	Journal of Magnetism and Magnetic Materials, 282: 135-138
Appears in Collections:	[Department of Physics] Periodical Articles

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