Crystal Growth, Magnetic and Electrical Transport Properties of the Kagome Magnet RCr6Ge6 (R = Gd - Tm)

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-12 DOI:10.1088/1674-1056/ad3dcf

Xingyu Yang, Qingqi Zeng, Miao He, Xitong Xu, Haifeng Du, Z. Qu

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Abstract

Kagome magnets have attracted considerable research attentions due to the interplay between topology, magnetism and electronic correlations. In this study, we report single crystal synthesis of a series of the kagome magnets RCr6Ge6 (R = Gd - Tm) which possess defect-free Cr kagome lattices, and systematically study their magnetic and electrical transport properties. The transition from canted ferrimagnetic to paramagnetic state in GdCr6Ge6, TbCr6Ge6, DyCr6Ge6, HoCr6Ge6, ErCr6Ge6, and TmCr6Ge6 occurs at 11.3 K, 10.8 K, 4.3 K, 2.5 K, 3.3 K, and below 2 K, respectively, due to R-R interactions within the compounds. Magnetization measurements reveal highly anisotropic magnetism with canted magnetic moments in these compounds. In the electrical transport, both negative and positive magnetoresistance at different magnetic field and temperature have been observed due to the competition between different scattering mechanisms. Our work enriches understandings on the Cr-based kagome magnets and paves way for searching possible topological responses in this family.

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鹿目磁体 RCr6Ge6（R = Gd - Tm）的晶体生长、磁性和电传输特性

由于拓扑、磁性和电子相关性之间的相互作用，鹿目磁体吸引了相当多的研究关注。在本研究中，我们报告了一系列具有无缺陷 Cr kagome 晶格的 Kagome 磁体 RCr6Ge6（R = Gd - Tm）的单晶合成，并系统地研究了它们的磁性和电传输特性。由于化合物内部的 R-R 相互作用，GdCr6Ge6、TbCr6Ge6、DyCr6Ge6、HoCr6Ge6、ErCr6Ge6 和 TmCr6Ge6 分别在 11.3 K、10.8 K、4.3 K、2.5 K、3.3 K 和低于 2 K 的温度下发生从悬臂铁磁态到顺磁态的转变。磁化测量结果表明，这些化合物具有高度各向异性的磁性，磁矩呈悬臂状。在电传输方面，由于不同散射机制之间的竞争，在不同磁场和温度下观察到了负磁阻和正磁阻。我们的研究工作丰富了人们对铬基卡戈米磁体的理解，并为寻找该系列可能的拓扑响应铺平了道路。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.