Giant anisotropic magnetocaloric effect in antiferromagnetic topological semimetal HoSb

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-12 DOI:10.1016/j.jallcom.2024.177495

Zilu Xia, Haifeng Chen, Yang Chen, Fang Tang, Rui Wang, Cuicui Hu, Lina Jiang, Yong Fang, Zhida Han, Jingguo Hu

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引用次数: 0

Abstract

Magnetic rare-earth-based single crystals have aroused great interest due to their giant magnetocaloric effect (MCE). In this work, we present the anisotropic magnetic properties and MCE of the antiferromagnetic topological semimetal HoSb. A magnetic transition occurs at the Néel temperature (T_N = 6.2 K), and the antiferromagnetic state below T_N leads to an inverse MCE. Due to magnetic anisotropy, the maximum negative magnetic entropy of the magnetic field (μ₀H) along the [100] direction attains a value of 44.33 J/kg K at 7 T, far exceeding the maximum negative magnetic entropy observed in the μ₀H//[110] and μ₀H//[111] directions. This anisotropic MCE results in a large rotational MCE, with the rotational maximum magnetic entropy measuring -17.99 J/kg K at 3 T and 14.56 J/kg K at 7 T. Additionally, the adiabatic temperature change and the refrigerant capacity were also calculated to further evaluate the MCE. The giant anisotropic magnetocaloric effect in HoSb makes it a potential candidate for low-temperature magnetocaloric applications.

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反铁磁拓扑半金属 HoSb 中的巨型各向异性磁致效应

稀土基磁性单晶由于其巨大的磁致效应（MCE）而引起了人们的极大兴趣。在这项研究中，我们介绍了反铁磁拓扑半金属 HoSb 的各向异性磁特性和 MCE。磁转变发生在奈尔温度（TN = 6.2 K），低于 TN 的反铁磁态会导致反 MCE。由于磁各向异性，磁场沿[100]方向的最大负磁熵（μ0H）在 7 T 时达到 44.33 J/kg K，远远超过在μ0H//[110]和μ0H//[111]方向观察到的最大负磁熵。这种各向异性的 MCE 导致了巨大的旋转 MCE，在 3 T 和 7 T 时，旋转最大磁熵分别为 -17.99 J/kg K 和 14.56 J/kg K。此外，还计算了绝热温度变化和制冷剂容量，以进一步评估 MCE。HoSb 中的巨大各向异性磁致效应使其成为低温磁致应用的潜在候选材料。

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 Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.