FIELD-DEPENDENT PREFACTOR OF THE THERMAL RELAXATION RATE IN SINGLE-DOMAIN MAGNETIC PARTICLES

被引：8

作者：

KLIK, I ^{[1
]}

CHANG, CR ^{[1
]}

HUANG, HL ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT PHYS,TAIPEI,TAIWAN

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.48.15823

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Within a model of the coherent rotation, we assume underdamped dynamics of magnetization in single-domain ferromagnetic particles and calculate the prefactor f0(h) of the thermal decay rate as a function of the applied field h. Four different models of dissipative coupling are considered. As opposed to the previously reported temperature dependence of the prefactor, the field dependence is remarkably independent of the chosen coupling mode. The prefactor f0(h) drops off sharply as h approaches the nucleation field and significantly enhances the coercivity whose model calculation, together with that of the switching-field distribution, is carried out.

引用

页码：15823 / 15828

页数：6

共 23 条

[1] NEW METHOD OF RESOLUTION OF BROWN MODEL FOR THE RELAXATION-TIME OF FINE MAGNETIC PARTICLES - APPROXIMATIVE FORMULA AND NUMERICAL-CALCULATIONS [J].