Qualitative comparison of the thermodynamics of Mn12-ac and Fe8 molecule magnets for dβ ~ 0.031

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorThomaz, M. T.-
Autor(es): dc.creatorRojas, O.-
Autor(es): dc.creatorCorrêa-Silva, E. V.-
Data de aceite: dc.date.accessioned2026-02-09T12:43:07Z-
Data de disponibilização: dc.date.available2026-02-09T12:43:07Z-
Data de envio: dc.date.issued2020-11-12-
Data de envio: dc.date.issued2020-11-12-
Data de envio: dc.date.issued2011-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/45475-
Fonte completa do material: dc.identifierhttps://www.worldscientific.com/doi/abs/10.1142/S0217984911026115-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1166889-
Descrição: dc.descriptionThe magnetization and the specific heat of two single molecule magnets (SMM) with spin-10, Mn12-ac and Fe8, are compared for Dβ ~ 0.031. The rhombic term in the Fe8 molecule makes the x-component of its magnetization to be larger than that of the Mn12-ac molecule. The axial symmetry of the Mn12-ac favors the z-component of its magnetization, in comparison to the Fe8 molecule. For T ≳ 18 K, the specific heat of the Mn12-ac is large (80%, at most) than that of the Fe8, at the same temperature. The corrections from the S = 9 excited states of these SMM's do not invalidate our results. An unexpected result occurs when the angle between the easy-axis and the external magnetic field equals π/4: the aforementioned percentage difference of the specific heat reaches 3% for D β ≲ 0.025 and h/k ∈[1.93, 2.04], when they are compared at distinct temperatures . This small percentage difference also happens for the average specific heat of both SMM's at those temperatures and h/DMn ∈ [1.97, 2.1].-
Idioma: dc.languageen-
Publicador: dc.publisherWorld Scientific Publishing-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceModern Physics Letters B-
Palavras-chave: dc.subjectQuantized spin models-
Palavras-chave: dc.subjectSingle molecule magnets-
Palavras-chave: dc.subjectTransverse anisotropy-
Palavras-chave: dc.subjectSkew magnetic field-
Palavras-chave: dc.subjectQuantum statistical mechanics-
Título: dc.titleQualitative comparison of the thermodynamics of Mn12-ac and Fe8 molecule magnets for dβ ~ 0.031-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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