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 × φ_x), magnetization versus single-ion anisotropy (m × φ_x), 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

中文翻译：

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具有两个随机横向单离子各向异性的spin-3 / 2 Blume-Capel量子模型的临界行为

摘要

使用基于Bogoliubov不等式的自由能方法，我们研究了在存在随机横向单离子各向异性（RTSIA）的情况下spin-3 / 2 Blume-Capel量子模型的磁性。通过相图的分析，例如温度与单离子各向异性（τ × φ _X），磁化与单离子各向异性（米× φ _X），和磁化与温度（米× τ）计划，我们已经获得有关各向异性的存在如何影响系统性能的信息。我们已经证明，与纯模型相比，RTSIA负责更改相图的拓扑，从而导致出现外观三临界点（TCP）。

图形概要