Instability of the rhodium magnetic moment as the origin of the metamagnetic phase transition in α-FeRh -: art. no. 064415

被引：94

作者：

Gruner, ME ^{[1
]}

Hoffmann, E ^{[1
]}

Entel, P ^{[1
]}

机构：

[1] Univ Duisburg, D-47048 Duisburg, Germany

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.67.064415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on ab initio total energy calculations we show that two magnetic states of rhodium atoms together with competing ferromagnetic and antiferromagnetic exchange interactions are responsible for a temperature-induced metamagnetic phase transition, which is experimentally observed for stoichiometric alpha-FeRh. Taking into account the results of previous and newly performed first-principles calculations we present a spin-based model, which allows us to reproduce this first-order metamagnetic transition by means of Monte Carlo simulations. Further inclusion of spacial variation of exchange parameters leads to a realistic description of the experimental magnetovolume effects in alpha-FeRh.

引用

页数：10

共 46 条

[1] Magnetostriction and thermal expansion measurements on FeRh1-xPtx alloys [J].