Physical Properties of Half-Heusler Antiferromagnet MnPtSn Single Crystal  

作　　者：Qi Wang Qianheng Du Cedomir Petrovic Hechang Lei 王琦;杜乾衡;Cedomir Petrovic;雷和畅(Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872;Condensed Matter Physics and Materials Science Division,Brookhaven National Laboratory,Upton,New York 11973,USA)

机构地区：[1]Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872 [2]Condensed Matter Physics and Materials Science Division,Brookhaven National Laboratory,Upton,New York 11973,USA

出　　处：《Chinese Physics Letters》2020年第2期65-69,共5页中国物理快报（英文版）

基　　金：Supported by the National Key R&D Program of China(Grant Nos.2018YFE0202600,2016YFA0300504);the National Natural Science Foundation of China(Nos.11574394,11774423,11822412);the Fundamental Research Funds for the Central Universities;the Research Funds of Renmin University of China(RUC)(Nos.15XNLQ07,18XNLG14,19XNLG17);the Office of Basic Energy Sciences,Materials Sciences and Engineering Division,U.S.Department of Energy(DOE)under Contract No.DE-SC0012704。

摘　　要：We report the growth of ternary half-Heusler MnPtSn single crystals and detailed study on its structural and physical properties.MnPtSn single crystal has a larger lattice parameter than that in polycrystal and it exhibits antiferromagnetism with transition temperature TN at about 215 K,distinctly different from the ferromagnetism of MnPtSn polycrystal.Hall resistivity measurement indicates that the dominant carriers are hole-type and the nearly temperature-independent carrier concentration reaches about 2.86×10^22 cm^-3 at 5 K.Moreover,the carrier mobility is also rather low(4.7 cm^2·V^-1s^-1 at 5 K).The above results strongly suggest that the significant Mn/Sn anti-site defects,i.e.,the content of Mn in MnPtSn single crystal,play a vital role on structural,magnetic and transport properties.

关 键 词：properties. STRUCTURAL CRYSTAL 

分 类 号：O469[理学—凝聚态物理]