A MODEL THAT GIVES RISE TO EFFECTIVE DRY FRICTION IN MICROMAGNETICS

被引：18

作者：

BALTENSPERGER, W ^{[1
]}

HELMAN, JS ^{[1
]}

机构：

[1] CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 73卷 / 10期

关键词：

D O I：

10.1063/1.352599

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Since dissipation requires motion, the velocity-independent friction of macroscopic systems must result from quick motions of some of its components. A model of coupled spins, some of which have irregular anisotropy directions, presents velocity independent loss. During a collective motion of the spin ensemble, an irregular spin can fall into its potential minimum, from which it is subsequently dragged out again. The effect is pronounced for a range of the ratio between the anisotropy and interatomic exchange coupling constants which is typical for rare-earth ions.

引用

页码：6516 / 6518

页数：3