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