Kagome晶格掺杂下Yb0.5(Co1-xFex)3Ge3结构序和磁各向异性的演化

IF 7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Chemistry of Materials Pub Date : 2025-03-07 DOI:10.1021/acs.chemmater.5c00119

Rahul Meduri, Mario A. Plata, Gregory T. McCandless, Benny C. Schundelmier, Mehak Ghafoor, Kaya Wei, Julia Y. Chan

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引用次数: 0

摘要

Kagome材料为探索拓扑和磁性的交叉提供了丰富的基础。本文报道了Yb0.5(Co1-xFex)3Ge3 （x = 0.00, 0.25, 0.50, 0.75和1.00）的单晶生长。当Fe被取代到含co的kagome网中时，结构由无序的Y0.5Co3Ge3/ cosn型杂化结构转变为有序的hffe6ge6型结构。在所有掺杂浓度中都观察到扩散散射，最终汇聚到Fe端成员的单一反射，最终沿c轴使单元胞加倍。通过各向异性磁测量来评估铁取代对kagome晶格磁性的影响。磁相互作用主要沿着c轴观察。此外，随着铁掺入的增加，磁性易轴的重新定向也被观察到，这突出了这种材料的磁性是如何被化学调谐的。还报道了在掺杂组合物中观察到的具有异常行为的电阻率。讨论了结构从无序到有序演变的基本原理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Evolution of Structural Order and Magnetic Anisotropy in Yb0.5(Co1–xFex)3Ge3 through Doping of a Kagome Lattice

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Evolution of Structural Order and Magnetic Anisotropy in Yb0.5(Co1–xFex)3Ge3 through Doping of a Kagome Lattice

Kagome materials provide fruitful grounds for exploring the intersection of topology and magnetism. In this article, the single crystal growth of Yb_0.5(Co_1–xFe_x)₃Ge₃ (x = 0.00, 0.25, 0.50, 0.75, and 1.00) is reported. As Fe is substituted into the Co-containing kagome net, the structure transforms from the disordered Y_0.5Co₃Ge₃/CoSn-type hybrid structure to the ordered HfFe₆Ge₆-type structure. Diffusive scattering is observed in all doped concentrations that eventually converge to a single reflection in the Fe end member, ultimately doubling the unit cell along the c-axis. Anisotropic magnetic measurements were performed to evaluate how the magnetism of the kagome lattice is influenced by Fe substitution. Magnetic interactions are primarily observed along the c-axis. Additionally, a reorientation of the magnetic easy axis is observed with increasing Fe incorporation, highlighting how the magnetism of this material can be chemically tuned. Resistivity with unusual behavior observed in the doped compositions is also reported. The rationale behind the structural evolution from disordered to ordered is discussed.

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来源期刊

Chemistry of Materials 工程技术-材料科学：综合

CiteScore

14.10

自引率

5.80%

发文量

929

审稿时长

1.5 months

期刊介绍： The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.