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Title: Effect of the magnetic field on the magnetostructural phase transition in Gd5(SixGe1-x)4
Author: Casanova i Fernàndez, Fèlix
Labarta, Amílcar
Batlle Gelabert, Xavier
Marcos, Jordi
Mañosa, Lluís
Planes Vila, Antoni
Brion, Sophie de
Keywords: Propietats magnètiques
Transformacions de fase (Física estadística)
Camps magnètics
Magnetic properties
Phase transformations (Statistical physics)
Magnetic fields
Issue Date: 2004
Publisher: The American Physical Society
Abstract: The first-order magnetostructural phase transition in Gd5(SixGe12x)4 alloys with x<0.5 and the related entropy change DS are analyzed from high-field magnetization curves up to 23 T, and differential scanning calorimetry up to 5 T. The variation of the transition field Ht with the transition temperature Tt is discussed for fields up to 23 T for the x<0.5 range. From these data, the ratio dHt /dTt , which is related to the strength of the magnetoelastic coupling, is obtained as a function of x. We show that DS obtained from the ClausiusClapyeron equation and the Maxwell relation are equivalent for all compositions (0<x<0.5), provided the Maxwell relation is evaluated only within the transition region. The T and H dependences of DS are accounted for by modeling the T and H dependences of the magnetization outside the transition.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2004, vol. 69, núm. 10, p. 104416-1-104416-7
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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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