Investigation on the magnetocaloric effect in DyNi2, DyAl2 and Tb1-nGdnAl2 (n=0, 0.4, 0.6) compounds

Investigation on the magnetocaloric effect in DyNi2, DyAl2 and Tb1-nGdnAl2 (n=0, 0.4, 0.6) compounds

Author Sousa, V. S. R. de Google Scholar
Plaza, E. J. R. Google Scholar
Reis, M. S. Google Scholar
Alho, B. P. Google Scholar
Carvalho, A. Magnus G. Google Scholar
Gama, S. Autor UNIFESP Google Scholar
Oliveira, N. A. de Google Scholar
von Ranke, P. J. Google Scholar
Institution Universidade do Estado do Rio de Janeiro (UERJ)
Univ Aveiro
Inmetro
Universidade Federal de São Paulo (UNIFESP)
Abstract The magnetocaloric effect (MCE) in the DyNi2, DyAl2 and Tb1-nGdnAl2 (n = 0, 0.4, 0.6) was theoretically investigated in this work. the DyNi2 and DyAl2 compounds are described considering a model Hamiltonian which includes the crystalline electrical field anisotropy. the anisotropic MCE was calculated changing the magnetic field direction from < 111 > to < 001 > in DyNi2 and from < 100 > to < 011 > in DyAl2. the influence of the second-and first-order spin-reorientation phase transitions on the MCE that occurs in these systems is discussed. for the calculations of the MCE thermodynamic quantities in the Tb1-nGdnAl2 systems we take into account a two sites magnetic model, and good agreement with the available experimental data was obtained. (C) 2009 Elsevier B.V. All rights reserved.
Keywords Crystalline electrical field
Magnetocaloric effect
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Date 2009-10-01
Published in Journal of Magnetism and Magnetic Materials. Amsterdam: Elsevier B.V., v. 321, n. 20, p. 3462-3465, 2009.
ISSN 0304-8853 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 3462-3465
Origin http://dx.doi.org/10.1016/j.jmmm.2009.06.054
Access rights Closed access
Type Article
Web of Science ID WOS:000268502300018
URI http://repositorio.unifesp.br/handle/11600/31861

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