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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/132255
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dc.contributor.authorGummich, Ute-
dc.contributor.authorCabrera, G. G.-
dc.contributor.authorGonçalves da Silva, C. E. T.-
dc.contributor.authorStein-Barana, Alzira C.M.-
dc.date.accessioned2014-05-27T11:17:53Z-
dc.date.accessioned2016-10-25T21:25:23Z-
dc.date.available2014-05-27T11:17:53Z-
dc.date.available2016-10-25T21:25:23Z-
dc.date.issued1993-08-01-
dc.identifierhttp://dx.doi.org/10.1016/0304-8853(93)90108-E-
dc.identifier.citationJournal of Magnetism and Magnetic Materials, v. 125, n. 3, p. 335-344, 1993.-
dc.identifier.issn0304-8853-
dc.identifier.urihttp://hdl.handle.net/11449/132255-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/132255-
dc.description.abstractWe study N-layer samples (N ≤ 10) for the Heisenberg model, with ferro- and antiferromagnetic exchange couplings, using a modified version of the Onsager reaction field approximation. The present scheme includes short-range spin-spin correlations, and allows for layer-dependent order parameters when free surface boundary conditions are imposed. The limits N = 1 (two dimensions) and N → ∞ (three dimensions) can be solved analytically, while systems with several layers have to be numerically calculated. We found no indication of a phase transition at finite temperature up to the sizes investigated (N = 10), the layered systems behaving essentially as two-dimensional. A phase transition is only obtained for the three-dimensional limit. © 1993.en
dc.format.extent335-344-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.sourceScopus-
dc.subjectAntiferromagnetism-
dc.subjectCorrelation methods-
dc.subjectFerromagnetism-
dc.subjectMagnetic couplings-
dc.subjectPhase transitions-
dc.subjectTemperature-
dc.subjectThree dimensional-
dc.subjectHeisenberg model-
dc.subjectLayer dependent order parameters-
dc.subjectMagnetic size effects-
dc.subjectOnsager reaction field approximation-
dc.subjectSpin-spin correlation-
dc.subjectUltrathin layer-
dc.subjectMagnetic thin films-
dc.titleMagnetic-size effects in ultrathin layersen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)-
dc.contributor.institutionLaboratório Nacional de Luz Síncrotron (LNLS)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationInstituto de Física Gleb Wataghin Universidade Estadual de Campinas (UNICAMP), CP 6165, Campinas, 13083-970 São Paulo-
dc.description.affiliationLaboratório Nacional de Luz Síncrotron (LNLS), CP 6192, Campinas, 13081 São Paulo-
dc.description.affiliationInstituto de Geociências e Ciências Exatas Departamento de Física Universidade Estadual Paulista (UNESP), Rio Claro, 13500-230 São Paulo-
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas Departamento de Física Universidade Estadual Paulista (UNESP), Rio Claro, 13500-230 São Paulo-
dc.identifier.doi10.1016/0304-8853(93)90108-E-
dc.identifier.wosWOS:A1993LW17700016-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Magnetism and Magnetic Materials-
dc.identifier.scopus2-s2.0-0027642544-
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