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作为液和温度的磁性冷却材料的DyF3微粉

A M Garaeva¹, G Iu Andreev¹, I V Romanova¹

¹Institute of Physics, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia.

Journal of physics. Condensed matter : an Institute of Physics journal

|July 25, 2025

概括

化 (DyF3) 粉末表现出显著的磁变化,使其成为磁冷却应用的有希望的材料. 它能够在低温下实现显著的温度变化,这凸显了其对先进冷却技术的潜力.

科学领域:

材料科学材料科学材料科学
凝聚物质物理学凝聚物质物理学
热力学是一种热力学.

背景情况:

磁冷却利用磁热效应进行制冷.
化 (DyF3) 是用于低温磁冷却的候选材料.
了解其磁性特性对于优化冷却性能至关重要.

研究的目的:

为了研究DyF3粉末的磁性特性.
为了评估其作为磁性冷却材料的潜力.
将实验结果与理论计算进行比较.

主要方法:

对DyF3粉末 (7微米颗粒大小) 进行了磁化测量.
计算了磁性变化和亚亚巴特温度变化.
格子的热容量是使用密度函数理论计算的.
使用交换费用模型计算磁热容量.

主要成果:

在5K时观察到25.5Jkg-1K-1的磁变化,场变化为7T.
在5K时,获得了24K的最大热温度变化.
热容量的理论计算与实验数据有很好的一致性.

结论:

DyF3在低温下表现出显著的磁热性质.
该材料有效用于在液态和液态温度附近的磁冷.
该研究验证了用于预测磁性材料行为的理论模型.

关键词:

DyF3 DyF3 DyF3 DyF3 DyF3 DyF3 DyF3 DyF3 DyF3 DyF3 它具有磁性,具有磁性属性.它具有磁热效应.

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