Magnetic properties and magnetocaloric effect of Gd1−xDyxVO4 (0 ≤ x ≤ 0.8) at low temperature

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-05-31 DOI:10.1016/j.jmmm.2025.173252

Guoming Lv , Xiukun Hu , Jiage Jia , Jianghuan Shi , Yi Zhao , Hongliang Ge , Hangfu Yang , Qiong Wu

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引用次数: 0

Abstract

Rare-earth vanadates have gained considerable attention owing to their unique structure and physical properties, making them suitable for applications in optical and magnetic devices. Herein, a novel Gd and Dy doped vanadate compound Gd_1−xDy_xVO₄ (0 ≤ x ≤ 0.8) (GDVO) was synthesized via solid-state sintering, and its magnetocaloric effect (MCE) was investigated. Results of X-ray diffraction analysis show that all the samples formed a single phase with the I41/amd space group of zircon-type compounds. The zero-field-cooling and field-cooling curves indicate that the phase transition temperature of the sample may be below 2 K and the antiferromagnetic coupling weakens with increasing Dy content. Under an external magnetic field change of 5 T (1 T), the maximum magnetic entropy change and the relative cooling power (RCP) of the GDVO samples can be tuned in the range of 26.59–36.67 J/(kg·K) (3.69–7.79 J/(kg·K)) and 231.85–398.82 J/kg (11.64–38.98 J/kg), respectively, for 0 ≤ x ≤ 0.8. Based on the mean-field theory, the power-law fit of the curve suggests that the there is a short-range ordered interaction in GDVO. The enhancement of the magnetic entropy change and RCP under low magnetic fields by element doping provides effective support for optimizing the MCE of the material. Moreover, GDVO exhibits an excellent MCE, making it promising for cryogenic refrigeration technology.

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Gd1−xDyxVO4（0≤x≤0.8）的低温磁性能和磁热效应

稀土钒酸盐由于其独特的结构和物理性质，使其在光学和磁性器件中得到了广泛的应用。本文采用固态烧结的方法合成了一种新型的Gd和Dy掺杂钒酸盐化合物Gd1−xDyxVO4(0≤x≤0.8)(GDVO)，并对其磁热效应（MCE）进行了研究。x射线衍射分析结果表明，所有样品均形成具有I41/amd空间群的锆石型化合物的单相。零场冷却和场冷却曲线表明，随着Dy含量的增加，样品的相变温度可能低于2 K，反铁磁耦合减弱。当外加磁场变化为5 T （1 T）时，GDVO样品的最大磁熵变化和相对冷却功率（RCP）分别可在26.59 ~ 36.67 J/(kg·K) （3.69 ~ 7.79 J/(kg·K)）和231.85 ~ 398.82 J/kg （11.64 ~ 38.98 J/kg）范围内调节。基于平均场理论，曲线的幂律拟合表明GDVO存在短程有序相互作用。元素掺杂对低磁场下磁熵变化和RCP的增强为优化材料的MCE提供了有效的支持。此外，GDVO表现出良好的MCE，使其在低温制冷技术中具有广阔的应用前景。

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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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.