TY - JOUR

T1 - Ferromagnetic phases due to competing short- and long-range interactions in the spin-5/2 and spin-2 Blume–Capel model

AU - Rodriguez Salmon, Octavio D.

AU - Neto, Minos A.

AU - Dinóla Neto, Francisco

AU - Murillo Pariona, Denis Américo

AU - Rojas Tapia, Justo

PY - 2018/11/23

Y1 - 2018/11/23

N2 - © 2018 Elsevier B.V. We broaden the study of the statistical physics of the spin-S Blume–Capel model with ferromagnetic mean-field interactions J in competition with short-range antiferromagnetic interactions K in a linear chain in the thermodynamic limit. This work is dedicated to the case when S takes the half-integer spin S=5/2 and when S assumes the integer value S=2. In both cases the phase diagrams exhibit new ferromagnetic phases (for certain values of K) enclosed by branches emerging from the first-order frontiers of the pure ferromagnetic model. For finite temperatures the complex topologies were obtained by numerical minimization of the free energy and some results were confirmed by Monte Carlo simulations.

AB - © 2018 Elsevier B.V. We broaden the study of the statistical physics of the spin-S Blume–Capel model with ferromagnetic mean-field interactions J in competition with short-range antiferromagnetic interactions K in a linear chain in the thermodynamic limit. This work is dedicated to the case when S takes the half-integer spin S=5/2 and when S assumes the integer value S=2. In both cases the phase diagrams exhibit new ferromagnetic phases (for certain values of K) enclosed by branches emerging from the first-order frontiers of the pure ferromagnetic model. For finite temperatures the complex topologies were obtained by numerical minimization of the free energy and some results were confirmed by Monte Carlo simulations.

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U2 - 10.1016/j.physleta.2018.09.004

DO - 10.1016/j.physleta.2018.09.004

M3 - Article

SP - 3325

EP - 3332

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

SN - 0375-9601

ER -