Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/97231
Type: Artigo de periódico
Title: Heat Flow Measurements And The Order Of The Magnetic Transition In (dy,gd)co 2 Solid Solutions
Author: De Sousa V.S.R.
Monteiro J.C.B.
Dos Reis R.D.
Medina A.N.
Gama S.
Von Ranke P.J.
Gandra F.C.G.
Abstract: In this work we present scanning heat flow measurements in the series of compounds Dy 1-xGd xCo 2 (x = 0, 0.1, 0.2, 0.3) which reveal a first order character in the magnetic transition for x = 0 and 0.1. The isothermal entropy change obtained for a magnetic field variation from 0 to 2T shows good agreement with the calculations based on a model Hamiltonian that takes into account the crystal field, magnetoelastic, exchange and Zeeman interactions. The maximum entropy change varies from 7.0 J/kg K (DyCo 2) to 1.8 J/kg K (Dy 0.7Gd 0.3Co 2) under a 2T magnetic field variation. The refrigerant cooling power (RCP) varies from 97 J/kg to 67 J/kg across the series. The entropy shows a strong correlation with the transition temperature regardless the transition type. © 2011 Elsevier B.V. All rights reserved.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.jallcom.2011.11.027
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-83555161551&partnerID=40&md5=3dd7143007e8d0bd93574d6979e92b0f
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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