高温反铁磁体ybco_2的一些磁性能和磁热效应

IF 2.6 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Magnetochemistry Pub Date : 2023-06-08 DOI:10.3390/magnetochemistry9060152

D. Salamatin, V. Krasnorussky, M. Magnitskaya, A. Semeno, A. Bokov, A. Velichkov, Z. Surowiec, Anatoly Vasilyevich Tsvyashchenko

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引用次数: 0

摘要

YbCoC2化合物在Amm2空间群CeNiC2结构中以碱基为中心的正交晶胞中结晶，由于其最高的磁有序温度为TN=27 K，在yb基化合物中是独一无二的。磁化测量使得绘制H-T磁相图和确定最近发现的高温重费米子化合物YbCoC2的磁热效应成为可能。YbCoC2在外磁场中通过超磁跃迁发生自旋转变为自旋极化态。我们发现跃迁是一级的。当ΔH≤6 T时，磁熵变化ΔSm(T) -的依赖关系具有正、负磁热效应段，当ΔH=9 T时，磁热效应变为正，在TN时ΔSm(T)最大值为4.1 J (kg K)−1，制冷剂容量为56.6 J kg−1。

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Some Magnetic Properties and Magnetocaloric Effects in the High-Temperature Antiferromagnet YbCoC2

The YbCoC2 compound, which crystallizes in a base-centered orthorhombic unit cell in the Amm2 space group CeNiC2 structure, is unique among Yb-based compounds due to the highest magnetic ordering temperature of TN=27 K. Magnetization measurements have made it possible to plot the H-T magnetic phase diagram and determine the magnetocaloric effect of this recently discovered high-temperature heavy-fermion compound, YbCoC2. YbCoC2 undergoes spin transformation to the spin-polarized state through a metamagnetic transition in an external magnetic field. The transition is found to be of the first order. The dependencies of magnetic entropy change ΔSm(T)—have segments with positive and negative magnetocaloric effects for ΔH≤6 T. For ΔH=9 T, the magnetocaloric effect becomes positive, with a maximum ΔSm(T) value of 4.1 J (kg K)−1 at TN and a refrigerant capacity value of 56.6 J kg−1.

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来源期刊

Magnetochemistry Chemistry-Chemistry (miscellaneous)

CiteScore

3.90

自引率

11.10%

发文量

145

审稿时长

11 weeks

期刊介绍： Magnetochemistry (ISSN 2312-7481) is a unique international, scientific open access journal on molecular magnetism, the relationship between chemical structure and magnetism and magnetic materials. Magnetochemistry publishes research articles, short communications and reviews. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.