ErBi单晶中的各向异性磁电阻研究  

Study on Anisotropic Magnetoresistance in ErBi Single Crystal

作　　者：沈雪 陈阳 樊陆源 韩志达 钱斌[1,2] 江学范 房勇[1,2] SHEN Xue;CHEN Yang;FAN Luyuan;HAN Zhida;QIAN Bin;JIANG Xuefan;FANG Yong(School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500,China;Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China)

机构地区：[1]常熟理工学院电子信息工程学院,江苏常熟215500 [2]常熟理工学院江苏省新型功能材料重点建设实验室,江苏常熟215500

出　　处：《常熟理工学院学报》2021年第2期21-23,共3页Journal of Changshu Institute of Technology

摘　　要：稀土锑/铋化物中4f电子的复杂自旋、轨道结构诱发了丰富的物理性质.本文重点研究ErBi单晶的热学和电学性质,揭示弱磁各向异性很有可能来源于混合效应,即Er^(3+)(4f^(11))中各向异性的基态电子通过相互作用与各向同性的激发态混合.此外,还发现ErBi的磁电阻具有双重或四重对称的角度相关性.研究表明该材料中角度相关的磁电阻主要由各向异性的费米面所决定.Rare-earth monopnictides have attracted a lot of attention due to their plentiful physical properties induced by complex spin and orbital orders.This paper makes a study of its thermal and electrical properties of ErBi single crystals.It is found that the weak magnetic anisotropy in ErBi possibly derives from the mixing effect,namely the anisotropic ground state of Er3+(4f11)mingles with the isotropic excited state through exchange interaction.At a low temperature,the angular magnetoresistance in ErBi shows a twofold(fourfold)symmetry.The angular magnetoresistance of ErBi could be mainly determined by its anisotropic Fermi surface topology.

关 键 词：比热 磁熵 磁电阻 

分 类 号：O469[理学—凝聚态物理]