Macroscopic quantum tunnelling and hysteresis loops of mesoscopic magnets

被引：90

作者：

Dobrovitski, VV ^{[1
]}

Zvezdin, AK ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST GEN PHYS,MOSCOW 117942,RUSSIA

来源：

EUROPHYSICS LETTERS | 1997年 / 38卷 / 05期

关键词：

D O I：

10.1209/epl/i1997-00254-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Theoretical investigation of the magnetisation process in high-spin cluster is performed. The source of hysteresis is studied; magnetisation jumps on hysteresis loops of a cluster corresponding to intersections of energy levels are described theoretically. An analytical formula for the dependence of the height of a jump on the sweeping rate of external field is obtained. It is shown that the width of a jump is crucially influenced by fluctuating fields produced by the cluster environment.

引用

页码：377 / 382

页数：6

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