Magnetocaloric effect in random magnetic anisotropy materials
Bohigas i Janoher, Xavier (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
Torres, Francesc 1948- (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Arnaudas, José Ignacio (Universidad de Zaragoza. Departamento de Física de la Materia Condensada)
Joven, Enrique (Universidad de Zaragoza. Departamento de Física de la Materia Condensada)
Del Moral, Agustín (Universidad de Zaragoza. Departamento de Física de la Materia Condensada)
Tejada, J. (Universitat de Barcelona. Departament de Física Fonamental)
American Physical Society

Date:	2002
Abstract:	In this letter we report the results of entropy variations in random anisotropy magnets composed of TbxY1−xAl2, with x=0. 15, 0. 20, 0. 25, 0. 35, 0. 40, and 0. 50. We discovered large entropy variation associated with the spin glass to paramagnetictransition. Both temperature transition and entropy changes were studied at different temperatures and with different compositions. Our conclusion is that these materials are suitable candidates for use as magnetic refrigerants in a temperature range below 40 K.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Entropy ; Glass transitions ; Magnetic anisotropy ; Magnetic materials ; Curie point ; Magnetocaloric effect ; Paramagnetism ; Spin glass models
Published in:	Applied physics letters, Vol. 81, Issue 13 (September 2002) , p. 2427-2429, ISSN 1077-3118

DOI: 10.1063/1.1506777

4 p, 376.6 KB

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