Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys

Felix Casanova; Amilcar Labarta; Xavier Batlle; Francisco J. Perez-Reche; Eduard Vives; Lluis Manosa; Antoni Planes

doi:10.1063/1.1968431

Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys

Felix Casanova, Amilcar Labarta, Xavier Batlle, Francisco J. Perez-Reche, Eduard Vives, Lluis Manosa, Antoni Planes

Physics

University of Barcelona

Research output: Contribution to journal › Article › peer-review

58 Citations (Scopus)

Abstract

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.

Original language	English
Article number	262504
Number of pages	3
Journal	Applied Physics Letters
Volume	86
Issue number	26
DOIs	https://doi.org/10.1063/1.1968431
Publication status	Published - 27 Jun 2005

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10.1063/1.1968431

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title = "Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys",

abstract = "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.",

author = "Felix Casanova and Amilcar Labarta and Xavier Batlle and Perez-Reche, {Francisco J.} and Eduard Vives and Lluis Manosa and Antoni Planes",

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T1 - Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys

AU - Casanova, Felix

AU - Labarta, Amilcar

AU - Batlle, Xavier

AU - Perez-Reche, Francisco J.

AU - Vives, Eduard

AU - Manosa, Lluis

AU - Planes, Antoni

PY - 2005/6/27

Y1 - 2005/6/27

N2 - 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.

AB - 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.

U2 - 10.1063/1.1968431

DO - 10.1063/1.1968431

M3 - Article

SN - 0003-6951

VL - 86

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 262504

ER -

Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys

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