Unusual magnetic behavior in Gd5(Si1.5Ge2.5) and Gd5(Si2Ge2)

被引：95

作者：

Levin, EM ^{[1
]}

Pecharsky, VK

Gschneidner, KA

机构：

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

[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.62.R14625

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coexistence of ferromagnetic: and paramagnetic phases in the 4f-electron systems Gd-5(S1.5Ge2.5) and Gd-5(Si2Ge2) during the magnetic-martensitic phase transition have been observed. A de magnetic field reversibly changes both the magnetic and crystal structures of the alloys above their respective Curie temperatures. A negative imaginary component of the uc magnetic susceptibility for both alloys has been observed in the ferromagnetic state. The results are discussed in terms of indirect Ruderman-Kittel-Kasuya-Yosida and direct superexchange interactions, and anomalies of the relaxation process.

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页码：14625 / 14628

页数：4

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