Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198608
Type: Artigo de periódico
Title: A Study Of Pressure And Chemical Substitution Effects On The Magnetocaloric Properties Of The Ferromagnetic Compound Uga(2).
Author: da Silva, L M
Dos Santos, A O
Medina, A N
Coelho, A A
Cardoso, L P
Gandra, F G
Abstract: We report on pressure effects on the magnetic and magnetocaloric properties of the compound UGa(2). Using a mean field approximation, we were able to calculate the isothermal entropy change and the adiabatic temperature change. Neither the applied pressure nor the chemical substitution experiments within the ranges studied revealed a remarkable improvement on the magnetocaloric effect (MCE) except for the Al substitutions. Nevertheless, we found that mechanical pressure and chemical pressure are equivalent in terms of the Curie temperature shift when Al, Ge and Si are substituted for Ga, but a different behavior is found when Ni, Fe and Co are used. Our results also show that a composite to operate between 80 and 120 K can be obtained using different concentrations of U(Ga,Ni)(2).
Rights: fechado
Identifier DOI: 10.1088/0953-8984/21/27/276001
Address: http://www.ncbi.nlm.nih.gov/pubmed/21828503
Date Issue: 2009
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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