Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/92713
Type: Artigo de periódico
Title: A Study Of Pressure And Chemical Substitution Effects On The Magnetocaloric Properties Of The Ferromagnetic Compound Uga2
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 UGa2. 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 120K can be obtained using different concentrations of U(Ga,Ni)2. © 2009 IOP Publishing Ltd.
Editor: 
Rights: fechado
Identifier DOI: 10.1088/0953-8984/21/27/276001
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-67651176171&partnerID=40&md5=b340006dd8d37a41b57db72aaab8e081
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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