CALCULATION OF THE SIZE DEPENDENCE OF THE COERCIVE FORCE IN FINE PARTICLES

被引：16

作者：

LYBERATOS, A

CHANTRELL, RW

机构：

[1] Lancashire Polytechnic, Preston

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1990年 / 26卷 / 05期

关键词：

D O I：

10.1109/20.104639

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The thermal agitation of the magnetisation is known to reduce the coercive force of very fine ferromagnetic particles. The switching behaviour depends on an energy barrier determined by the interplay of the magnetostatic, exchange, magnetocrystalline and applied field. A numerical micromagnetic model is employed to calculate the energy barrier for the reversal in a γFe2O3 particle of cubic shape. The model simulates magnetisation reversal by coherent rotation and curling. The size dependence of the switching field is a good qualitative fit to experimental data. © 1990 IEEE

引用

页码：2119 / 2121

页数：3

共 11 条

[1]

AHARONI A, 1959, J APPL PHYS S, V30, P70

[2]

Bean C.P., 1959, SUPPL J APPL PHYS, V30, P1205, DOI DOI 10.1063/1.1735100

[3] THERMAL FLUCTUATIONS OF FINE FERROMAGNETIC PARTICLES [J].