Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/40954
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dc.creatorStrečka, Jozef-
dc.creatorRebič, Matúš-
dc.creatorRojas, Onofre-
dc.creatorSouza, Sergio Martins de-
dc.date.accessioned2020-05-15T18:06:09Z-
dc.date.available2020-05-15T18:06:09Z-
dc.date.issued2019-01-01-
dc.identifier.citationSTRECKA, J. et al. Anomalous spin frustration enforced by a magnetoelastic coupling in the mixed-spin Ising model on decorated planar lattices. Journal of Magnetism and Magnetic Materials, Amsterdam, v. 469, p. 655-664, 1 Jan. 2019.pt_BR
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0304885318316226#!pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/40954-
dc.description.abstractThe mixed spin-1/2 and spin-S Ising model on a decorated planar lattice accounting for lattice vibrations of decorating atoms is treated by making use of the canonical coordinate transformation, the decoration-iteration transformation, and the harmonic approximation. It is shown that the magnetoelastic coupling gives rise to an effective single-ion anisotropy and three-site four-spin interaction, which are responsible for the anomalous spin frustration of the decorating spins in virtue of a competition with the equilibrium nearest-neighbor exchange interaction between the nodal and decorating spins. The ground-state and finite-temperature phase diagrams are constructed for the particular case of the mixed spin-1/2 and spin-1 Ising model on a decorated square lattice for which thermal dependencies of the spontaneous magnetization and specific heat are also examined in detail. It is evidenced that a sufficiently strong magnetoelastic coupling leads to a peculiar coexistence of the antiferromagnetic long-range order of the nodal spins with the disorder of the decorating spins within the frustrated antiferromagnetic phase, which may also exhibit double reentrant phase transitions. The investigated model displays a variety of temperature dependencies of the total specific heat, which may involve in its magnetic part one or two logarithmic divergences apart from one or two additional round maxima superimposed on a standard thermal dependence of the lattice part of the specific heat.pt_BR
dc.languageen_USpt_BR
dc.publisherElsevierpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceJournal of Magnetism and Magnetic Materialspt_BR
dc.subjectIsing modelpt_BR
dc.subjectMixed spinspt_BR
dc.subjectMagnetoelastic couplingpt_BR
dc.subjectSpin frustrationpt_BR
dc.subjectSpecific heatpt_BR
dc.subjectModelo Isingpt_BR
dc.subjectAcoplamento magnetoelásticopt_BR
dc.subjectSpins mistospt_BR
dc.subjectFrustração de spinpt_BR
dc.subjectCalor específicopt_BR
dc.titleAnomalous spin frustration enforced by a magnetoelastic coupling in the mixed-spin Ising model on decorated planar latticespt_BR
dc.typeArtigopt_BR
Appears in Collections:DEX - Artigos publicados em periódicos
DFI - Artigos publicados em periódicos

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