Magnetic Gruneisen parameter for model systems

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dc.contributor.authorGomes, Gabriel O. [UNESP]
dc.contributor.authorSquillante, Lucas [UNESP]
dc.contributor.authorSeridonio, A. C. [UNESP]
dc.contributor.authorNey, Andreas
dc.contributor.authorLagos, Roberto E. [UNESP]
dc.contributor.authorSouza, Mariano de [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionJohannes Kepler Univ Linz
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2019-10-04T12:41:11Z
dc.date.available2019-10-04T12:41:11Z
dc.date.issued2019-08-28
dc.description.abstractThe magnetocaloric effect (MCE), which is the refrigeration based on the variation of the magnetic entropy, is of great interest in both technological applications and fundamental research. The MCE is quantified by the magnetic Gruneisen parameter Gamma(mag). We report on an analysis of Gamma(mag) for the classical Brillouin-like paramagnet for a modified Brillouin function taking into account a zero-field splitting originated from the spin-orbit (SO) interaction and for the one-dimensional Ising (1DI) model under a longitudinal field. For the Brillouin-like model with SO interaction and the longitudinal 1DI model, a sign-change in the MCE is observed for vanishing T and B. SO interaction leads to a narrowing of the enhancement of Gamma(mag) for T and B -> 0. Our findings emphasize the relevance of Gamma(mag) for exploring critical points. Also, we show that the Brillouin model with and without SO interaction can be recovered from the 1DI model in the regime of high temperatures and vanishing coupling constant J.en
dc.description.affiliationSao Paulo State Univ, UNESP, Dept Fis, IGCE, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationSao Paulo State Univ, UNESP, Fac Engn Ilha Solteira, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationJohannes Kepler Univ Linz, Inst Semicond & Solid State Phys, A-4040 Linz, Austria
dc.description.affiliationUniv Sao Paulo, Dept Astron, BR-05508090 Sao Paulo, Brazil
dc.description.affiliationUnespSao Paulo State Univ, UNESP, Dept Fis, IGCE, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, UNESP, Fac Engn Ilha Solteira, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipT.U.V.S.O.T.E
dc.description.sponsorshipAustrian Academy of Science OAW
dc.description.sponsorshipAustrian Science Fund (FWF)
dc.description.sponsorshipIdFAPESP: 2011/22050-4
dc.description.sponsorshipIdFAPESP: 2017/07845-7
dc.description.sponsorshipIdCNPq: 302498/20176
dc.description.sponsorshipIdCNPq: 305668/2018-8
dc.description.sponsorshipIdAustrian Science Fund (FWF): P26164-N20
dc.format.extent10
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.100.054446
dc.identifier.citationPhysical Review B. College Pk: Amer Physical Soc, v. 100, n. 5, 10 p., 2019.
dc.identifier.doi10.1103/PhysRevB.100.054446
dc.identifier.issn2469-9950
dc.identifier.urihttp://hdl.handle.net/11449/186089
dc.identifier.wosWOS:000482940800006
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review B
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleMagnetic Gruneisen parameter for model systemsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.author.lattes4319898277403494[3]
unesp.author.orcid0000-0002-2388-6006[4]
unesp.author.orcid0000-0001-5612-9485[3]

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Artigos - Física - IGCE