Critical behavior of the spin-3/2 Blume-Capel quantum model with two random transverse single-ion anisotropies

Itacy José Souza, Mauricio Godoy (), Alberto Sebastião de Arruda and Thiago Miranda Tunes
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Itacy José Souza: Instituto de Física, Universidade Federal de Mato Grosso
Mauricio Godoy: Instituto de Física, Universidade Federal de Mato Grosso
Alberto Sebastião de Arruda: Faculdade de Engenharia, Universidade Federal do Mato Grosso
Thiago Miranda Tunes: Faculdade de Engenharia, Universidade Federal do Mato Grosso

The European Physical Journal B: Condensed Matter and Complex Systems, 2020, vol. 93, issue 12, 1-13

Abstract: Abstract Using the approach based on the Bogoliubov inequality for free energy, we have studied the magnetic properties of the spin-3/2 Blume-Capel quantum model in the presence of the random transverse single-ion anisotropy (RTSIA). By analysis of the phase diagrams such as temperature versus single-ion anisotropy (τ × φx), magnetization versus single-ion anisotropy (m × φx), and magnetization versus temperature (m × τ) plans, we have obtained information about how the presence of anisotropy affects the properties of the system. We have shown that the RTSIA is responsible for changing the topology of the phase diagrams, compared to the pure model, leading to the appearance tricritical point (TCP). Graphical abstract

Keywords: Statistical; and; Nonlinear; Physics (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1140/epjb/e2020-10284-1

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