Magnetic properties and cryogenic magnetocaloric effect in α-Gd2(MoO4)3 compound

IF 1.8 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics Pub Date : 2024-06-06 DOI:10.1016/j.cryogenics.2024.103875

Jiahao Gao , Zuhua Chen , Xinqi Zheng , Guochun Zhang , Shilin Yu , Zhenxing Li , Heng Tu , Jun Shen

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引用次数: 0

Abstract

Magnetic refrigeration technology has received extensive attention due to its application prospects in various fields. The research of magnetocaloric materials is the basis for the development of magnetic refrigeration technology. In this study, the α-Gd₂(MoO₄)₃ was prepared by the high temperature solid state reaction. By X-ray diffraction characterization, α-Gd₂(MoO₄)₃ crystallizes in monoclinic structure (space group C12/c1). Furthermore, its magnetism and magnetocaloric effect are investigated. The magnetic ordering temperature of α-Gd₂(MoO₄)₃ is less than 1.8 K and there is a second-order phase transition. The maximum magnetic entropy changes are 20.8 and 32.7 J kg⁻¹ K⁻¹ under the field changes of 0–2 T and 0–5 T, respectively. Besides, the refrigeration capacity and relative cooling power are 142.0 and 190 J kg⁻¹ under field change of 0–5 T. These properties indicate that α-Gd₂(MoO₄)₃ is an excellent candidate for low temperature magnetic refrigeration.

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α-Gd2(MoO4)3化合物的磁性能和低温磁致效应

磁制冷技术因其在各个领域的应用前景而受到广泛关注。磁致性材料的研究是磁制冷技术发展的基础。本研究通过高温固态反应制备了 α-Gd2(MoO4)3。通过 X 射线衍射表征，α-Gd2(MoO4)3 结晶为单斜结构（空间群 C12/c1）。此外，还研究了α-Gd2(MoO4)3 的磁性和磁致效应。α-Gd2(MoO4)3 的磁有序温度小于 1.8 K，并存在二阶相变。在磁场变化为 0-2 T 和 0-5 T 时，最大磁熵变化分别为 20.8 和 32.7 J kg-1 K-1。这些特性表明，α-Gd2(MoO4)3 是低温磁制冷的理想候选材料。

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来源期刊

Cryogenics 物理-热力学

CiteScore

3.80

自引率

9.50%

发文量

审稿时长

2.1 months

期刊介绍： Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are: - Applications of superconductivity: magnets, electronics, devices - Superconductors and their properties - Properties of materials: metals, alloys, composites, polymers, insulations - New applications of cryogenic technology to processes, devices, machinery - Refrigeration and liquefaction technology - Thermodynamics - Fluid properties and fluid mechanics - Heat transfer - Thermometry and measurement science - Cryogenics in medicine - Cryoelectronics