Magnetic properties of the quaternary alloy with the mixtures of integer and half-integer spins

IF 1.3 4区材料科学 Q3 CRYSTALLOGRAPHY Phase Transitions Pub Date : 2022-12-31 DOI:10.1080/01411594.2022.2159822

A. Kpadonou, R. Yessoufou, R. Houenou, E. Albayrak

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Abstract

ABSTRACT The ferrimagnetic-ferromagnetic-ferrimagnetic quaternary alloy consisting of the spins , , and in the form of with B, C and D being the possible nearest-neighbors of A with the probabilities p, q and r, respectively, is investigated in terms of the mean field theory (MFT) based on the Bogoliubov inequality for free energy. The thermal behaviors of magnetizations belonging to the individual spins and total magnetization are examined in detail to map the possible phase diagrams on various planes. It was found that the model only exhibits second-order phase transitions in addition to one compensation temperature for appropriate values of the system parameters. In order to support the existence of the compensation temperatures, we have also carried out the Monte Carlo (MC) simulations and an agreement was shown with the predicted result of the MFT approach. We have also analyzed the effects of the bilinear interaction parameter between type-A atoms and the exchange interaction parameter ratio ( is the bilinear interaction parameter between type-A atoms and type-X atoms with X = C or D) on compensation temperatures. Our findings are compared to those reported in the literature and suitable agreements are observed.

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整数和半整数自旋混合的四元合金的磁性能

摘要基于自由能的Bogoliubov不等式，利用平均场论（MFT）研究了由自旋组成的铁磁-铁磁四元合金，其形式为B、C和D分别是A的可能近邻，概率分别为p、q和r。详细研究了属于单个自旋和总磁化的磁化的热行为，以绘制不同平面上可能的相图。研究发现，对于适当的系统参数值，除了一个补偿温度外，该模型只表现出二阶相变。为了支持补偿温度的存在，我们还进行了蒙特卡罗（MC）模拟，结果与MFT方法的预测结果一致。我们还分析了A型原子之间的双线性相互作用参数和交换相互作用参数比率（即A型原子和X型原子之间与X = C或D）。我们的研究结果与文献中报道的结果进行了比较，并观察到了适当的一致性。

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来源期刊

Phase Transitions 物理-晶体学

CiteScore

3.00

自引率

6.20%

发文量

审稿时长

1.4 months

期刊介绍： Phase Transitions is the only journal devoted exclusively to this important subject. It provides a focus for papers on most aspects of phase transitions in condensed matter. Although emphasis is placed primarily on experimental work, theoretical papers are welcome if they have some bearing on experimental results. The areas of interest include: -structural phase transitions (ferroelectric, ferroelastic, multiferroic, order-disorder, Jahn-Teller, etc.) under a range of external parameters (temperature, pressure, strain, electric/magnetic fields, etc.) -geophysical phase transitions -metal-insulator phase transitions -superconducting and superfluid transitions -magnetic phase transitions -critical phenomena and physical properties at phase transitions -liquid crystals -technological applications of phase transitions -quantum phase transitions Phase Transitions publishes both research papers and invited articles devoted to special topics. Major review papers are particularly welcome. A further emphasis of the journal is the publication of a selected number of small workshops, which are at the forefront of their field.