ABINITIO MICROMAGNETIC CALCULATIONS FOR PARTICLES (INVITED)

被引：70

作者：

FREDKIN, DR

KOEHLER, TR

机构：

[1] UNIV CALIF SAN DIEGO, CTR MAGNET RECORDING RES, LA JOLLA, CA 92093 USA

[2] IBM CORP, DIV RES, ALMADEN RES CTR K08028, SAN JOSE, CA 95120 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 09期

关键词：

D O I：

10.1063/1.345881

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the results of first-principles calculations of the magnetic behavior of particles of varying shapes (sphere, prolate spheroid, and rectangular particles of various aspect ratios) and sizes ranging from ≊0.1 to 10 μm. We use a numerical implementation of micromagnetics in which the only input quantities, aside from the particle geometry, are the material parameters and the magnetic history. We have obtained quantitative agreement with theory for spherical particles and qualitative agreement with experiment in the case of rectangular objects, and we have observed a variety of interesting reversible and irreversible phenomena accompanying magnetic reversal in all objects. We describe key aspects of the numerical implementation and survey selected results.

引用

页码：5544 / 5548

页数：5