Numerical study of a mixed Ising ferrimagnetic system
作者： G M Buendía , M A Novotny
DOI: 10.1088/0953-8984/9/27/021
关键词: Condensed matter physics 、 Tricritical point 、 Ising model 、 Square lattice 、 Ferrimagnetism 、 Spins 、 Mean field theory 、 Statistical physics 、 Monte Carlo method 、 Phase diagram 、 Physics
摘要: We present a study of classical ferrimagnetic model on square lattice in which the two interpenetrating sublattices have spins one-half and one. This is relevant for understanding bimetallic molecular ferrimagnets that are currently being synthesized by several experimental groups. perform exact ground-state calculations model, employ Monte Carlo numerical transfer-matrix techniques to obtain finite-temperature phase diagram both transition compensation temperatures. When only nearest-neighbour interactions included, our non-perturbative results indicate no point or tricritical at finite temperature, contradicts earlier obtained with mean-field analysis.
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