Exchange coupling in pure hcp Gd and magnetostructural transition in Gd5(Si2Ge2) -: art. no. 10A310

被引：11

作者：

Samolyuk, GD ^{[1
]}

Antropov, VP ^{[1
]}

机构：

[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2005年 / 97卷 / 10期

关键词：

D O I：

10.1063/1.1851693

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electronic structure and magnetic properties of Gd and Gd-5(Si2Ge2) systems were studied using the band structure approach. Multiple-scattering formalism of exchange coupling calculation was implemented and Curie temperature was calculated in pure Gd. The decrease of exchange coupling in Gd-5(Si2Ge2) through structural transformation leads to first-order magnetostructural phase transition with large value of vertical bar partial derivative H/partial derivative T vertical bar and giant magnetocaloric effect. (c) 2005 American Institute of Physics.

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