(Ba,K)(Zn,Mn)2Sb2: A New Type of Diluted Magnetic Semiconductor

Crystals

卷:10

Zheng Deng¹  Xiancheng Wang¹  Runze Yu¹  Qingqing Liu¹  Sijia Zhang¹  Shuang Yu¹  Guoqiang Zhao¹  Wenmin Li¹  Changqing Jin¹  Yi Peng¹  Jianfa Zhao¹  YasutomoJ. Uemura² 

[1] Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;

[2] Department of Physics, Columbia University, New York, NY 10027, USA;

关键词: diluted magnetic semiconductor;    independent charge and spin doping;    spin-glass behaviors;    large magnetoresistance;   

DOI  :  10.3390/cryst10080690

来源: DOAJ

【 摘 要 】

A series of polycrystalline samples of a new diluted magnetic semiconductor (DMS) (Ba,K)(Zn,Mn)₂Sb₂ has been synthesized and systematically studied. The parent phase is the so-called “Zintl compound” BaZn₂Sb₂, a week-degenerate semiconductor with a narrow band gap of 0.2 eV. In (Ba,K)(Zn,Mn)₂Sb_2, the charge is doped by (Ba,K) substitution while the spin is independently doped by (Zn,Mn) substitution. (Ba,K)(Zn,Mn)₂Sb₂ and analogue (Ba,K)(Zn,Mn)₂As₂ have comparable narrow band gaps, carrier and spin concentrations. However, the former establishes a short-range spin-glass order at a very low temperature (<10 K), while the latter forms a long-range ferromagnetic ordering with a Curie temperature up to 230 K. The sharp contrast makes (Ba,K)(Zn,Mn)₂Sb₂ to be a touchstone for DMS theoretical models.

【 授权许可】

Unknown