Volume 79, Number 4, August 2007
Article Number 47009
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 25 July 2007
EPL, 79 (2007) 47009
DOI: 10.1209/0295-5075/79/47009

Field dependence of the magnetocaloric effect in Gd and (Er1-xDyx)Al2: Does a universal curve exist?

V. Franco1, A. Conde1, V. K. Pecharsky2 and K. A. Gschneidner jr.2

1  Departamento de Física de la Materia Condensada, ICMSE-CSIC, Universidad de Sevilla P.O. Box 1065, 41080 Sevilla, Spain
2  Ames Laboratory and Department of Materials Science and Engineering, Iowa State University Ames, IA 50011-3020, USA

received 26 April 2007; accepted in final form 29 June 2007; published August 2007
published online 25 July 2007

The field dependence of the magnetic entropy change of ferromagnetic lanthanide-based materials has been studied. The recently proposed master curve for the field dependence of the magnetocaloric effect of Fe-based amorphous alloys can also be constructed for these lanthanide-based crystalline materials, suggesting a universal behavior. The exponent n controlling the field dependence of the magnetic entropy change can be used for the interpretation of results in the case of multiple magnetic ordering phenomena.

75.30.Sg - Magnetocaloric effect, magnetic cooling.

© Europhysics Letters Association 2007