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Title: Entropy change and magnetocaloric effect in Gd5(SixGe1-x)4
Author: Casanova i Fernàndez, Fèlix
Batlle Gelabert, Xavier
Labarta, Amílcar
Marcos, Jordi
Mañosa, Lluís
Planes Vila, Antoni
Keywords: Entropia
Transformacions de fase (Física estadística)
Phase transformations (Statistical physics)
Issue Date: 2002
Publisher: The American Physical Society
Abstract: 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.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2002, vol. 66, núm. , p. 100401(1)-100401(4)
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Física de la Matèria Condensada)

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