Monte Carlo Study of Mixed-Spin S=1-2,1 Ising Ferrimagnets - Condensed Matter > Materials ScienceReportar como inadecuado




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Abstract: We investigate Ising ferrimagnets on square and simple-cubic lattices withexchange couplings between spins of values S=1-2 and S=1 on neighbouring sitesand an additional single-site anisotropy term on the S=1 sites. Based mainly ona careful and comprehensive Monte Carlo study, we conclude that there is notricritical point in the two-dimensional case, in contradiction to mean-fieldpredictions and recent series results. However, evidence for a tricriticalpoint is found in the three-dimensional case. In addition, a line ofcompensation points is found for the simple-cubic, but not for the squarelattice.



Autor: W. Selke J. Oitmaa

Fuente: https://arxiv.org/







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