Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1-x)4 giant magnetocaloric alloys -: art. no. 262504

被引：54

作者：

Casanova, F

Labarta, A

Batlle, X

Pérez-Reche, FJ

Vives, E

Mañosa, L

Planes, A

机构：

[1] Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, Spain

[2] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 26期

关键词：

D O I：

10.1063/1.1968431

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Direct observation of the entropy change in a first-order phase transition is obtained by using a differential scanning calorimeter in which the transition is field-induced under the application of an external magnetic field. This procedure enables direct evaluation of the magnetocaloric effect in materials showing first-order magnetostructural phase transitions. Results for Gd-5(SixGe1-x)(4) giant magnetocaloric alloys are reported. Calorimetric curves sweeping the field through the transition reveal a unusual increase of the entropy change with cycling. This increase is accounted for by considering both the structural and magnetic contributions to the total entropy change.

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页码：1 / 3

页数：3

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