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作者:A. Bobák , E. Jurčišinová ...
来源:[J].Physica A: Statistical Mechanics and its Applications(IF 1.676), 2018
摘要:Abstract(#br)We investigate phase transitions and critical behaviors in the frustrated J 1 − J 2 − J 3 transverse Ising antiferromagnet on a honeycomb lattice using an effective-field theory. We find that at large negative J 3 ∕ | J 1 | ( < − 1 ∕ 3 ) there is a tri...
作者:M. Žukovič , M. Borovský , A. Bobák
来源:[J].Physics Letters A(IF 1.766), 2018, Vol.382 (19), pp.1305-1311
摘要:Abstract(#br)We study a stacked triangular lattice Ising model with both intra- and inter-plane antiferromagnetic interactions in a field, by Monte Carlo simulation. We find only one phase transition from a paramagnetic to a partially disordered phase, which is of second order an...
作者:A. Bobák , T. Lučivjanský ...
来源:[J].Physics Letters A(IF 1.766), 2016, Vol.380 (34), pp.2693-2697
摘要:Abstract(#br)We use the effective-field theory with correlations based on different cluster sizes to investigate phase diagrams of the frustrated Ising antiferromagnet on the honeycomb lattice with isotropic interactions of the strength J 1 < 0 between nearest-neighbour pairs and...
作者:M. Žukovič , A. Bobák
来源:[J].Physica A: Statistical Mechanics and its Applications(IF 1.676), 2015, Vol.436, pp.509-518
摘要:Abstract(#br)By Monte Carlo simulations we study critical properties of the mixed spin-1/2 and spin-1 Ising model on a triangular lattice, considering two different ways of the spin-value distributions on the three sublattices: ( 1 / 2 , 1 / 2 , 1 ) and ( 1 / 2 , 1 , 1 ) . I...
作者:M. Žukovič , A. Bobák
来源:[J].Physics Letters A(IF 1.766), 2016, Vol.380 (9-10), pp.1087-1092
摘要:Abstract(#br)We study a bilayer Ising spin system consisting of antiferromagnetic (AF) and ferromagnetic (FM) triangular planes, coupled by ferromagnetic exchange interaction, by standard Monte Carlo and parallel tempering methods. The AF/FM bilayer is found to display the critic...
作者:A. Bobák , F.O. Abubrig , T. Balcerzak
来源:[J].Journal of Magnetism and Magnetic Materials(IF 1.826), 2003, Vol.272, pp.989-990
摘要:Abstract(#br)The phase diagrams of the AB p C 1− p ternary alloy composed of Ising spins S A = 3 2 ,S B =1 , and S C = 5 2 in the presence of a single-ion anisotropy are investigated by the use of a mean-field theory. The numerical results are presented for the system with p...
作者:A. Bobák , Z. Fecková , M. Žukovič
来源:[J].Journal of Magnetism and Magnetic Materials(IF 1.826), 2011, Vol.323 (6), pp.813-818
摘要:Abstract(#br)The effects of both an exchange anisotropy and a single-ion anisotropy on the phase diagram and magnetization curves of the ferromagnetic mixed spin- 3 2 and spin- 1 2 Heisenberg model are investigated by the use of an Oguchi approximation. Although the theory is dev...
作者:A. Bobák , J. Dely , M. Žukovič
来源:[J].Physica A: Statistical Mechanics and its Applications(IF 1.676), 2011, Vol.390 (11), pp.1953-1960
摘要:Abstract(#br)The effects of both an exchange anisotropy and a single-ion anisotropy on the phase diagram and the compensation temperature of the mixed spin-1 and spin- 1 2 Heisenberg ferrimagnet are investigated by the use of an Oguchi approximation. Particular emphasis is given ...
作者:A. Bobák , M. Jurčišin
来源:[J].Physica A: Statistical Mechanics and its Applications(IF 1.676), 1997, Vol.240 (3), pp.647-656
摘要:Abstract(#br)The critical behaviour of a mixed spin - 1 2 and spin-1 Ising system is investigated by the use of the two-site cluster effective-field theory. The general expressions for evaluating the transition temperature and the tricritical point are obtained. Particular attent...
作者:A. Bobák , O.F. Abubrig , D. Horváth
来源:[J].Physica A: Statistical Mechanics and its Applications(IF 1.676), 2002, Vol.312 (1), pp.187-207
摘要:Abstract(#br)We have studied the magnetic properties of a mixed ferro–ferrimagnet composed of three different metal ions with spins 1 2 ,1 , and 3 2 which includes both ferromagnetic and antiferromagnetic interactions. The system is considered in the frame of an Ising model ...

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