Влияние Ga-замещения на структурные и магнитные свойства биксбиита (Mn,Fe)-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-

Физика твердого тела Pub Date : 2023-01-01 DOI:10.21883/ftt.2023.06.55665.57

Е. М. Мошкина, Максим С. Молокеев, Е. В. Еремин, Л. Н. Безматерных

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Abstract

To study the dependence of the properties of ternary oxides (Mn,Fe,Ga)2O3 with the bixbyite structure on the composition, the temperature dependences of the magnetization and ac magnetic susceptibility of two single-crystal samples of different compositions obtained using the flux method were analyzed. A detailed study of the structure was carried out using single-crystal X-ray diffraction analysis, and the changes in structural parameters depending on the composition were analyzed. The dc magnetization and ac magnetic susceptibility of Fe1.1Mn0.76Ga0.14O3 and Fe0.65Mn1.1Ga0.26O3 bixbyites have been studied. Despite the qualitatively similar behavior of the magnetic properties, significant differences were also found, despite a small difference in the Mn/Fe/Ga ratio in the samples under study. It is shown that both compounds experience two successive low-temperature magnetic phase transitions from the paramagnetic phase at T = 20–32 K as the temperature is lowered. Calculations of the Mydosh parameter for the detected phase transitions showed different degrees of ordering in the compounds under study.

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Ga-替代对比克斯比特结构和磁性的影响

为了研究具有bixbyite结构的三元氧化物(Mn,Fe,Ga)2O3的性能对组成的依赖关系，分析了用通量法获得的两种不同组成的单晶样品磁化强度和交流磁化率的温度依赖性。利用单晶x射线衍射分析对其结构进行了详细的研究，并分析了结构参数随成分的变化。研究了Fe1.1Mn0.76Ga0.14O3和Fe0.65Mn1.1Ga0.26O3 bixbyite的直流磁化率和交流磁化率。尽管磁性能的性质相似，但也发现了显著的差异，尽管所研究样品的Mn/Fe/Ga比略有不同。结果表明，随着温度的降低，两种化合物在温度为20 ~ 32 K时均经历了顺磁相的连续两次低温磁相变。对检测到的相变的Mydosh参数的计算表明，在所研究的化合物中存在不同程度的有序。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Физика твердого тела

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