文章信息/Info

Title:

Magnetic and Transport Properties of Triangular Antiferromagnetic Materials Mn3Z(Z=Ga,Ge,Sn)

文章編號:

1674-3962(2021)11-0861-10

作者:

張強強1; 柳祝紅1; 馬星橋1; 劉恩克2

（1.北京科技大學物理系，北京 100083）（2.中國科學院物理研究所 北京凝聚態物理國家實驗室，北京 100190）

Author(s):

ZHANG Qiangqiang1;  LIU Zhuhong1;  MA Xingqiao1;  LIU Enke2

(1.Department of Physics，University of Science and Technology Beijing，Beijing 100083，China) (2.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics，Chinese Academy of Sciences，Beijing 100190，China)

關鍵詞:

Mn3Z(Z=Ga; Ge; Sn); 反鐵磁材料; 拓撲材料; 霍爾效應; 能斯特（Nernst）效應

Keywords:

Mn3Z(Z=Ga; Ge; Sn) alloys;  antiferromagnetic materials;  topological materials;  Hall effect;  Nernst effect

分類號:

O469

DOI:

10.7502/j.issn.1674-3962.202107017

文獻標志碼:

A

摘要:

反鐵磁材料具有零磁矩或非常小的磁矩，不易受外磁場干擾。相對于鐵磁材料，反鐵磁材料具有更低的能量損耗和更高的響應頻率等優點，因在自旋電子學領域的實際應用方面具有巨大潛力而備受關注。作為一種兼具Kagome晶格及三角反鐵磁性的特殊自旋電子學材料，六角Mn3Z（Z=Ga，Ge，Sn）合金展現出巨大的反�；魻栃�應、拓撲霍爾效應、自旋霍爾效應以及反常能斯特（Nernst）效應等。這些物理效應涉及到當今凝聚態物理研究中最前沿的問題，對它們的研究不僅可以深化對凝聚態磁性物理的理解，而且也驅動了反鐵磁自旋電子學的發展。首先介紹了Mn3Z合金的晶格結構及特殊的磁結構，簡要分析了理論計算得到的電子結構對材料輸運性能的影響。結合實驗報道的Mn3Z的磁性及輸運性質等對3種六角結構合金的優異性能及研究進展進行了概述，揭示了磁結構和電子結構對材料輸運性質的物理機制，并對Mn3Z系列合金拓撲相關的輸運性質進行了展望。

Abstract:

Antiferromagnetic materials exhibit zero or rather low moment, so it would not be affected by external magnetic field. Furthermore, they have advantages of lower power consumption and higher frequency response compared with ferromagnetic materials, which makes them have great potential applications in the field of spintronics. Hexagonal Mn3Z(Z=Ga, Ge, Sn) alloys, with both Kagome lattice and triangular antiferromagnetism, exhibit large anomalous Hall effect, topological Hall effect, spin Hall effect and anomalous Nernst effect. These effects involve the most advanced problems in condensed matter physics. The study of them can not only deepen the understanding of condensed matter magnetic physics, but also drive the development of antiferromagnetic spintronics. In this paper, the research progress in magnetic and transport properties are reviewed. The crystal structure and the special magnetic structure of Mn3Z alloys are introduced. The influence of the electronic structure on the transport properties is briefly analyzed. An overview of the excellent properties of the Mn3Z(Z=Ga, Ge, Sn) alloys and their research progress is given in relation to the experimentally reported magnetic and transport properties. An outlook is given for the topologically relevant transport properties of the Mn3Z alloys.