Magnetic-field-induced structural phase transition in Gd5(Si1.8Ge2.2)

被引：352

作者：

Morellon, L

Algarabel, PA

Ibarra, MR ^{[1
]}

Blasco, J

García-Landa, B

Arnold, Z

Albertini, F

机构：

[1] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[3] CSIC, E-50009 Zaragoza, Spain

[4] Acad Sci Czech Republ, Inst Phys, CR-16200 Prague 6, Czech Republic

[5] CNR, Ist Mat Speciali Elettron & Magnetismo, I-43100 Parma, Italy

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.58.R14721

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present direct evidence that the giant magnetocaloric effect recently discovered in the Gd-5(Si1.8Ge2.2) alloy is associated with a field-induced first-order structural transition from a P112(1)/a monoclinic (paramagnetic) to a Pnma orthorhombic (ferromagnetic) structure. A large volume contraction of Delta V/V congruent to 0.4% takes place spontaneously at the transition temperature, T(C)congruent to 240 K. The reported structural transition can be induced reversibly by application of an external magnetic field, producing strong magnetoelastic effects.

引用

页码：R14721 / R14724

页数：4

共 17 条

[1] A STRUCTURAL PHASE-TRANSITION INDUCED BY AN EXTERNAL MAGNETIC-FIELD [J].