Heat flow measurements and the order of the magnetic transition in (Dy,Gd)Co-2 solid solutions

dc.creatorde Sousa, VSR
dc.creatorMonteiro, JCB
dc.creatordos Reis, RD
dc.creatorMedina, AN
dc.creatorGama, S
dc.creatorvon Ranke, PJ
dc.creatorGandra, FCG
dc.date2012
dc.dateFEB 5
dc.date2014-07-30T17:49:33Z
dc.date2015-11-26T17:13:10Z
dc.date2014-07-30T17:49:33Z
dc.date2015-11-26T17:13:10Z
dc.date.accessioned2018-03-29T00:01:32Z
dc.date.available2018-03-29T00:01:32Z
dc.identifierJournal Of Alloys And Compounds. Elsevier Science Sa, v. 513, n. 615, n. 619, 2012.
dc.identifier0925-8388
dc.identifierWOS:000298156400105
dc.identifier10.1016/j.jallcom.2011.11.027
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/68178
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/68178
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1281505
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionIn this work we present scanning heat flow measurements in the series of compounds Dy1-xGdxCo2 (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 (DyCo2) to 1.8 J/kg K (Dy0.7Gd0.3Co2) 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. (C) 2011 Elsevier B.V. All rights reserved.
dc.description513
dc.description615
dc.description619
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationJournal Of Alloys And Compounds
dc.relationJ. Alloy. Compd.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectMagnetocaloric effect
dc.subjectFerrimagnetism
dc.subjectRare earth - transition metal alloys
dc.subjectSpin Hamiltonians
dc.subjectItinerant-electron Metamagnetism
dc.subjectMagnetocaloric Properties
dc.subjectIntermetallic Compounds
dc.subjectPhase-transition
dc.subjectLaves Phases
dc.subjectRco2
dc.subjectAlloys
dc.subjectYco2
dc.titleHeat flow measurements and the order of the magnetic transition in (Dy,Gd)Co-2 solid solutions
dc.typeArtículos de revistas


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