Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys
Direct observation of the magnetic-field-induced entropy change in Gd5(SixGe1−x)4 giant magnetocaloric alloys
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DOI：
10.1063/1.1968431
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发表时间：
2005-06
影响因子：
4
通讯作者：
F. Casanova;A. Labarta;X. Batlle;F. Pérez-Reche;E. Vives;L. Mañosa;A. Planes
中科院分区：
文献类型：
--
作者：
F. Casanova;A. Labarta;X. Batlle;F. Pérez-Reche;E. Vives;L. Mañosa;A. Planes
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 Gd5(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.
