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2002

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10523

Entropy change and magnetocaloric effect in Gd5(SixGe1-x)4

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http://dx.doi.org/10.1103/PhysRevB.66.100401

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.

Subject

Entropia, Magnetostricció, Transformacions de fase (Física estadística)

Subject (English)

Entropy, Magnetostriction, Phase transformations (Statistical physics)

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Física de la Matèria Condensada)

Citation

CASANOVA I FERNÀNDEZ, Fèlix, et al. Entropy change and magnetocaloric effect in Gd5(SixGe1-x)4. Physical Review B. 2002. Vol. 66, pags. 100401(1)-100401(4). ISSN 0163-1829. [consulted: 17 of August of 2026]. Available at: https://hdl.handle.net/2445/10523

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