中国物理B ›› 2023, Vol. 32 ›› Issue (10): 107502-107502.doi: 10.1088/1674-1056/acd925

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Anomalous Hall effect in ferromagnetic LaCo2As2 and ferrimagnetic NdCo2As2

Yu-Qing Huang(黄雨晴)1,2, Peng-Yu Zheng(郑鹏宇)3, Rui Liu(刘瑞)3, Xi-Tong Xu(许锡童)1, Zi-Yang Wu(吴紫阳)4, Chao Dong(董超)4, Jun-Feng Wang(王俊峰)4, Zhi-Ping Yin(殷志平)3, and Shuang Jia(贾爽)1,2,5,†   

  1. 1 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100081, China;
    2 Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, China;
    3 Department of Physics and Center for Advanced Quantum Studies, Beijing Normal University, Beijing 100875, China;
    4 Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
    5 Kunshan Innovation Institute of Nanjing University, Kunshan 215347, China
  • 收稿日期:2023-04-14 修回日期:2023-05-26 接受日期:2023-05-26 出版日期:2023-09-21 发布日期:2023-10-08
  • 通讯作者: Shuang Jia E-mail:gwljiashuang@pku.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB1502502), the National Natural Science Foundation of China (Grant Nos. 12141002 and 12225401), the Fund from Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory. The work in the high magnetic field lad was supported by the Interdisciplinary Program of Wuhan National High Magnetic Field Center (Grant No. WHMFC202123), Huazhong University of Science and Technology. Z. Y. was supported by the National Natural Science Foundation of China (Grant Nos. 12074041 and 11674030), the Foundation of the National Key Laboratory of Shock Wave and Detonation Physics (Grant No. 6142A03191005), the National Key Research and Development Program of China (Grant No. 2016YFA0302300), and the startup funding of Beijing Normal University.

Anomalous Hall effect in ferromagnetic LaCo2As2 and ferrimagnetic NdCo2As2

Yu-Qing Huang(黄雨晴)1,2, Peng-Yu Zheng(郑鹏宇)3, Rui Liu(刘瑞)3, Xi-Tong Xu(许锡童)1, Zi-Yang Wu(吴紫阳)4, Chao Dong(董超)4, Jun-Feng Wang(王俊峰)4, Zhi-Ping Yin(殷志平)3, and Shuang Jia(贾爽)1,2,5,†   

  1. 1 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100081, China;
    2 Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, China;
    3 Department of Physics and Center for Advanced Quantum Studies, Beijing Normal University, Beijing 100875, China;
    4 Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
    5 Kunshan Innovation Institute of Nanjing University, Kunshan 215347, China
  • Received:2023-04-14 Revised:2023-05-26 Accepted:2023-05-26 Online:2023-09-21 Published:2023-10-08
  • Contact: Shuang Jia E-mail:gwljiashuang@pku.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB1502502), the National Natural Science Foundation of China (Grant Nos. 12141002 and 12225401), the Fund from Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory. The work in the high magnetic field lad was supported by the Interdisciplinary Program of Wuhan National High Magnetic Field Center (Grant No. WHMFC202123), Huazhong University of Science and Technology. Z. Y. was supported by the National Natural Science Foundation of China (Grant Nos. 12074041 and 11674030), the Foundation of the National Key Laboratory of Shock Wave and Detonation Physics (Grant No. 6142A03191005), the National Key Research and Development Program of China (Grant No. 2016YFA0302300), and the startup funding of Beijing Normal University.

摘要: We conducted a comparative study of the magnetic and transport properties of single-crystalline LaCo2As2 and NdCo2As2. LaCo2As2 is a soft metallic ferromagnet which exhibits purely intrinsic anomalous Hall effect (AHE) due to Co-3d electrons. With Nd-4f electronic magnetism, ferrimagnetic NdCo2As2 manifests pronounced sign reversal and multiple hysteresis loops in temperature- and field-dependent magnetization, Hall resistivity, and magnetoresistance, due to complicated magnetic structural changes. We reveal that the AHE for NdCo2As2 is stemming from the Co sub-lattice and deduce its phase diagram which includes magnetic compensation and two meta-magnetic phase transitions. The sensitivity of the Hall effect on the details of the magnetic structures in ferrimagnetic NdCo2As2 provides a unique opportunity to explore the magnetic interaction between 4f and 3d electrons and its impact on the electronic structure.

关键词: anomalous Hall effect, ferrimagnetism, magnetic compensation, meta-magnetic transitions

Abstract: We conducted a comparative study of the magnetic and transport properties of single-crystalline LaCo2As2 and NdCo2As2. LaCo2As2 is a soft metallic ferromagnet which exhibits purely intrinsic anomalous Hall effect (AHE) due to Co-3d electrons. With Nd-4f electronic magnetism, ferrimagnetic NdCo2As2 manifests pronounced sign reversal and multiple hysteresis loops in temperature- and field-dependent magnetization, Hall resistivity, and magnetoresistance, due to complicated magnetic structural changes. We reveal that the AHE for NdCo2As2 is stemming from the Co sub-lattice and deduce its phase diagram which includes magnetic compensation and two meta-magnetic phase transitions. The sensitivity of the Hall effect on the details of the magnetic structures in ferrimagnetic NdCo2As2 provides a unique opportunity to explore the magnetic interaction between 4f and 3d electrons and its impact on the electronic structure.

Key words: anomalous Hall effect, ferrimagnetism, magnetic compensation, meta-magnetic transitions

中图分类号:  (Magnetotransport phenomena; materials for magnetotransport)

  • 75.47.-m
75.50.Gg (Ferrimagnetics) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))