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arXiv:1607.03930 · Physica A Statistical Mechanics and its Applications

Multicritical behavior of the two-dimensional transverse Ising metamagnet in a longitudinal magnetic field

Denise Andrade do Nascimento, J.T.M. Pacobahyba, Minos A. Neto, Octavio D. Rodrı́guez Salmon, J. A. Plascak

Published Jan 23, 2017• 7 citations
arXivHTMLPDF
DOI
10.1016/j.physa.2017.01.078

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The ground state properties of the two-sublattice Ising metamagnet in the transverse field are studied introducing the mean-field theory. A phase diagram is given via the h-Ω rectanguler coordinates where h is the longitudinal field and Ω is the transverse field. The ground state energy, the longitudinal total magnetization, staggered magnetization and susceptibility and the transverse total magnetization are all calculated. The results show that when the transverse field Ω is small but the longitudinal field h great, the first-order transition occurs, and when the former is great but the later small the second-order transition occurs in the system. The effect of the transverse field Ω on the ground state properties of the two-sublattice Ising metamagnet is important.