4.5 Article

Magnetization reversal of single domain permalloy nanowires

期刊

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 18, 页码 2916-2919

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2009.04.057

关键词

Magnetization reversal modes; Single domain; Permalloy nanowires; Magnetoresistance hysteresis

资金

  1. Hong Kong UGC/CERG [603106, 603007, 603508, RPC07/08.SC03]

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Magnetization reversal process and magnetoresistance (MR) hysteresis of single domain permalloy nanowires are numerically investigated by using OOMMF. It is shown that the abrupt jumps in the magnetoresistance are due to the domain formation and domain wall propagation so that a magnetic domain suddenly switches from one state into another. A nonmonotonic angular dependence of the jump (switching) field is found. Coherent rotation mode is responsible for the smooth variation of MR curves. The nucleation pattern of newly born domains depends on the tilted angle of external field. (C) 2009 Elsevier B.V. All rights reserved.

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