Anomalous Hall effect in ferromagnetic LaCo_(2)As_(2) and ferrimagnetic NdCo_(2)As_(2)  

作　　者：黄雨晴 郑鹏宇 刘瑞 许锡童 吴紫阳 董超 王俊峰 殷志平 贾爽 Yu-Qing Huang;Peng-Yu Zheng;Rui Liu;Xi-Tong Xu;Zi-Yang Wu;Chao Dong;Jun-Feng Wang;Zhi-Ping Yin;Shuang Jia(International Center for Quantum Materials,School of Physics,Peking University,Beijing 100081,China;Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Xianhu Hydrogen Valley,Foshan 528200,China;Department of Physics and Center for Advanced Quantum Studies,Beijing Normal University,Beijing 100875,China;Wuhan National High Magnetic Field Center and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;Kunshan Innovation Institute of Nanjing University,Kunshan 215347,China)

机构地区：[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

出　　处：《Chinese Physics B》2023年第10期641-648,共8页中国物理B（英文版）

基　　金：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;supported by the Interdisciplinary Program of Wuhan National High Magnetic Field Center(Grant No.WHMFC202123);Huazhong University of Science and Technology;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);the startup funding of Beijing Normal University。

摘　　要：We conducted a comparative study of the magnetic and transport properties of single-crystalline LaCo_(2)As_(2) and NdCo_(2)As_(2).LaCo_(2)As_(2) is a soft metallic ferromagnet which exhibits purely intrinsic anomalous Hall effect(AHE) due to Co-3d electrons. With Nd-4f electronic magnetism, ferrimagnetic NdCo_(2)As_(2) 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 NdCo_(2)As_(2) 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 NdCo_(2)As_(2) 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 

分 类 号：O469[理学—凝聚态物理]