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Type: Artigo de periódico
Title: The giant anisotropic magnetocaloric effect in DyAl(2)
Author: von Ranke, PJ
de Oliveira, NA
Plaza, EJR
de Sousa, VSR
Alho, BP
Carvalho, AMG
Gama, S
Reis, MS
Abstract: We report on calculations of the anisotropic magnetocaloric effect in DyAl(2) using a model Hamiltonian including crystalline electrical field effects. The anisotropic effect is produced by the rotation of a constant magnetic field from the easy to a hard magnetic direction in the crystal and is enhanced by the first order nature of the field induced spin reorientation transition. The calculated results indicate that for a field with modulus of 2 T rotating from a hard to the easy direction, the isothermal magnetic entropy (Delta S(iso)) and adiabatic temperature (Delta T(ad)) changes present peak values higher than 60% the ones observed in the usual process, in which the field direction is kept constant and the modulus of the field is varied. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3009974]
Country: EUA
Editor: Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1063/1.3009974
Date Issue: 2008
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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