Colossal negative magnetoresistance in spin glass Na(Zn,Mn)Sb

作     者：Shuang Yu Yi Peng Guoqiang Zhao Jianfa Zhao Xiancheng Wang Jun Zhang Zheng Deng Changqing Jin Shuang Yu;Yi Peng;Guoqiang Zhao;Jianfa Zhao;Xiancheng Wang;Jun Zhang;Zheng Deng;Changqing Jin

作者机构：Beijing National Laboratory for Condensed Matter Physicsand Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of PhysicsUniversity of Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2023年第44卷第3期

页      面：62-67页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the Ministry of Science and Technology(MOST) NSF of China through the research projects(2018YFA03057001,11820101003) CAS Project for Young Scientists in Basic Research(YSBR-030) support of Beijing Nova program(2020133) the Youth Innovation Promotion Association of CAS(2020007). 

主　　题：colossal negative magnetoresistance spin glass diluted magnetic materials 

摘      要：We report the study of magnetic and transport properties of polycrystalline and single crystal Na(Zn,Mn)Sb,a new member of“111type of diluted magnetic materials.The material crystallizes into Cu2Sb-type structure which is isostructural to“111type Fe-based superconductors.With suitable carrier and spin doping,the Na(Zn,Mn)Sb establishes spin-glass ordering with freezing temperature(Tf)below 15 K.Despite lack of long-range ferromagnetic ordering,Na(Zn,Mn)Sb single crystal still shows sizeable anomalous Hall effect below Tf.Carrier concentration determined by Hall effect measurements is over 1019 cm-3.More significantly,we observe colossal negative magnetoresistance(MR≡[ρ(H)−ρ(0)]/ρ(0))of-94%in the single crystal sample.