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Type: Artigo de periódico
Title: The Giant Anisotropic Magnetocaloric Effect In Dyal2
Author: Von Ranke P.J.
De Oliveira N.A.
Plaza E.J.R.
De Sousa V.S.R.
Alho B.P.
Carvalho A.M.G.
Gama S.
Reis M.S.
Abstract: We report on calculations of the anisotropic magnetocaloric effect in DyAl2 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 (Δ Siso) and adiabatic temperature (Δ Tad) 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. © 2008 American Institute of Physics.
Rights: aberto
Identifier DOI: 10.1063/1.3009974
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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