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 · 发表于：Journal of Semiconductors · 年份：2023 · DOI：10.1088/1674-4926/44/3/032501 · 被引用次数：12 · 研究领域：Magnetic and transport properties of perovskites and related materials、Iron-based superconductors research、Rare-earth and actinide compounds

Abstract We report the study of magnetic and transport properties of polycrystalline and single crystal Na(Zn,Mn)Sb, a new member of “111” type of diluted magnetic materials. The material crystallizes into Cu 2 Sb-type structure which is isostructural to “111” type Fe-based superconductors. With suitable carrier and spin doping, the Na(Zn,Mn)Sb establishes spin-glass ordering with freezing temperature ( T f ) below 15 K. Despite lack of long-range ferromagnetic ordering, Na(Zn,Mn)Sb single crystal still shows sizeable anomalous Hall effect below T f . Carrier concentration determined by Hall effect measurements is over 10 19 cm –3 . More significantly, we observe colossal negative magnetoresistance (MR ≡ [ ρ ( H ) − ρ (0)]/ ρ (0)) of –94% in the single crystal sample.