Entropy change and magnetocaloric effect in Gd5(SixGe1-x)4 -: art. no. 100401

被引：84

作者：

Casanova, F

Batlle, X

Labarta, A

Marcos, J

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：

PHYSICAL REVIEW B | 2002年 / 66卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.66.100401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Isothermal magnetization curves up to 23 T have been measured in Gd5Si1.8Ge2.2. We show that the values of the entropy change at the first-order magnetostructural transition, obtained from the Clausius-Clapeyron equation and the Maxwell relation, are coincident, provided the Maxwell relation is evaluated only within the transition region and the maximum applied field is high enough to complete the transition. These values are also in agreement with the entropy change obtained from differential scanning calorimetry. We also show that a simple phenomenological model based on the temperature and field dependence of the magnetization accounts for these results.

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页码：1 / 4

页数：4

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