Analysis of magnetocaloric effect of ball milled amorphous alloys: Demagnetizing factor and Curie temperature distribution

被引：0

作者：

Moreno-Ramírez, L.M. ^{[1
]}

Ipus, J.J. ^{[1
]}

Franco, V. ^{[1
]}

Blázquez, J.S. ^{[1
]}

Conde, A. ^{[1
]}

机构：

[1] Dpto. Física de la Materia Condensada, ICMSE-CSIC, Universidad de Sevilla, P.O. Box 1065, Sevilla,41080, Spain

来源：

Journal of Alloys and Compounds | 2015年 / 622卷

关键词：

The magnetocaloric effect (MCE) has been measured for an amorphous mechanically alloyed (MA) Co62Nb6Zr2B30. It is demonstrated that sample shape must be taken into account for a correct interpretation of the results; especially to correctly determine the field dependence of magnetic entropy change and refrigerant capacity. However; although correcting the influence of the demagnetizing factor allows us to recover the theoretically predicted behavior for these field dependencies; they differ from those obtained for a rapidly quenched (RQ) amorphous alloy of the same composition. This deviation is assigned to a broader Curie temperature distribution in MA alloys with respect to RQ alloys. Theoretical simulations based on the Arrott-Noakes equation of state and a Gaussian distribution of TC support this hypothesis. © 2014 Elsevier B.V. All rights reserved;

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Journal article (JA)

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页码：606 / 609