期刊
PHYSICA B-CONDENSED MATTER
卷 407, 期 23, 页码 4574-4578出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2012.08.014
关键词
Hard/soft bilayers; Hysteresis loops; 3D micromagnetic calculation
资金
- National Natural Science Foundation of China [11074179, 10747007]
- Construction Plan for Scientific Research Innovation Teams of Universities in Sichuan Province [12TD008]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
Hysteresisloops and magneticreversalprocesses have been determined by a three dimensional (3D) micromagnetic model for exchange-coupled Nd2Fe14B/alpha-Fe bilayers and carefully compared with a popular one-dimensional (1D) micromagnetic model. It is found that the calculated hysteresisloops, the critical fields and the magnetic phase diagrams agree well with the results given by the 1D model. However, the calculated nucleation mode is a quasi-curling one where the magnetic moment exhibits a curling in the film plane and varies in the thickness direction, in contrast with the reported quasi-coherent mode. The calculated spatial distribution of the magnetization orientation in the thickness direction at various applied fields signifies a three-step magneticreversalprocess, which includes nucleation, growth and displacement of the domain wall as well as the rotation and the reversal of magnetization in the hard phase. The magneticreversal of the hard phase is much slower than that given by the 1D model, leading to a more slant hysteresisloop near the coercivity point. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据