THE PINNING FORCE BETWEEN A BLOCH WALL AND A PLANAR PINNING SITE IN MNALC

被引：7

作者：

CHEN, XH

GAUNT, P

机构：

[1] Department of Physics, University of Manitoba, Winnipeg

来源：

JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.345509

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The maximum pinning force between a Bloch wall and a planar pinning site is calculated to depend linearly on K3/21/A 1/21, where K1 and A1 are the anisotropy and exchange constants of the ferromagnet, and as a result the pinning force is, in general, a function of the temperature. The temperature dependence of the coercive field Hc(T) of a MnAlC permanent magnet is well described in a model that considers two factors; one is the temperature dependence of the height of the energy barrier that a domain wall has to overcome on breaking away from a pinning site, and the other is thermal energy which assists a domain wall to cross the energy barrier.

引用

页码：2540 / 2543

页数：4

共 14 条

[1]

CHIKAZUMI S, 1964, PHYSICS MAGNETISM, P273

[2] THEORY OF INTRINSIC MAGNETIC AFTEREFFECT .1. THERMALLY ACTIVATED PROCESS [J].