Extremely large magnetoresistance in high quality magnetic Fe2Ge3 single crystals

IF 5.5 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Communications Physics Pub Date : 2025-03-25 DOI:10.1038/s42005-025-02041-0

Y.H Chen, Weibin Wu, Y.‐L. He, Jiaying Zhang, He Tian, Zhe Li, Qi-Ling Xiao, Jun‐Yi Ge

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引用次数: 3

Abstract

Extremely large magnetoresistance (XMR) is typically observed in topological materials as associated with factors such as high mobility carriers and electron-hole compensation. However, its occurrence in magnetic materials is rather rare due to the stability of the electron spin in magnetic fields. In this study, the synthesis of high-quality single crystals of Fe2Ge3 with the highest residual resistivity ratio (RRR = 4778) has allowed to explore its intrinsic magnetic and electrical transport properties, revealing a narrow-gap semiconductor nature with a high XMR of 2057% at 1.8 K and 12 T. In addition, Fe2Ge3 is able to bridge the gap between magnetism and XMR. These findings not only advance our understanding of Fe2Ge3, but also open avenues for the development of spintronic devices and other technologies based on magnetic semiconductors. Phenomena that bridge magnetism and extremely large magnetoresistance in materials have the potential to expand fundamental research towards practical technological innovations. The authors synthesize Fe-Ge single crystal demonstrating high temperature ferromagnetism and magnetoresistance. These results disclose novel pathways to implement advanced spintronic devices.

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在高质量的磁性Fe2Ge3单晶中具有极高的磁阻

在拓扑材料中通常观察到与高迁移率载流子和电子-空穴补偿等因素有关的极大磁阻（XMR）。然而，由于电子自旋在磁场中的稳定性，它在磁性材料中的出现是相当罕见的。本研究合成了残余电阻率最高（RRR = 4778）的高质量Fe2Ge3单晶，探索了其固有的磁性和电输运性质，揭示了在1.8 K和12 t下XMR高达2057%的窄间隙半导体性质，并且Fe2Ge3能够弥合磁性和XMR之间的差距。这些发现不仅促进了我们对Fe2Ge3的理解，而且为基于磁性半导体的自旋电子器件和其他技术的发展开辟了道路。在材料中桥接磁性和极大磁阻的现象具有将基础研究扩展到实用技术创新的潜力。合成了具有高温铁磁性和磁阻的Fe-Ge单晶。这些结果揭示了实现先进自旋电子器件的新途径。

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

Communications Physics Physics and Astronomy-General Physics and Astronomy

CiteScore

8.40

自引率

3.60%

发文量

276

审稿时长

13 weeks

期刊介绍： Communications Physics is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of the physical sciences. Research papers published by the journal represent significant advances bringing new insight to a specialized area of research in physics. We also aim to provide a community forum for issues of importance to all physicists, regardless of sub-discipline. The scope of the journal covers all areas of experimental, applied, fundamental, and interdisciplinary physical sciences. Primary research published in Communications Physics includes novel experimental results, new techniques or computational methods that may influence the work of others in the sub-discipline. We also consider submissions from adjacent research fields where the central advance of the study is of interest to physicists, for example material sciences, physical chemistry and technologies.