ON THE ORIGIN OF SHORT-RANGE ORDER ABOVE TC IN FE, CO, NI

被引：36

作者：

HEINE, V ^{[1
]}

LIECHTENSTEIN, AI ^{[1
]}

MRYASOV, ON ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY

来源：

EUROPHYSICS LETTERS | 1990年 / 12卷 / 06期

关键词：

D O I：

10.1209/0295-5075/12/6/013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strong magnetic short-range order has been observed in Fe and Ni above the Curie temperature T,. The origin of this short-range order has always been somewhat of an enigma. We give here a simple theory to show that the ferromagnetic coupling Jl between nearest neighbours is weaker in the ferromagnetic state than in the completely disordered local moment state. Thus it is relatively easy for the system to disorder on a coarse length scale, retaining locally a substantial degree of ferromagnetic order. © 1990 IOP Publishing Ltd.

引用

页码：545 / 550

页数：6

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