(Ca,K)(Zn,Mn)2As2: Ferromagnetic semiconductor induced by decoupled charge and spin doping in CaZn2As2

• Published in: Journal of semiconductors Vol. 43; no. 7; pp. 81 - 86
• Main Authors: Dong, Jinou, Zhao, Xueqin, Fu, Licheng, Gu, Yilun, Zhang, Rufei, Yang, Qiaolin, Xie, Lingfeng, Ning, Fanlong
• Format: Journal Article
• Language: English
• Published: Chinese Institute of Electronics 01.07.2022; Zhejiang Province Key Laboratory of Quantum Technology and Device and Department of Physics,Zhejiang University,Hangzhou 310027,China%Zhejiang Province Key Laboratory of Quantum Technology and Device and Department of Physics,Zhejiang University,Hangzhou 310027,China; Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China; State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 310027,China
• Subjects: CaZn; Curie temperature; diluted magnetic semiconductor; ferromagnetic ordering; ferromagnetic ordering; CaZn2As2; diluted magnetic semiconductor; Curie temperature
• ISSN: 1674-4926
• DOI: 10.1088/1674-4926/43/7/072501

We have successfully synthesized a novel diluted magnetic semiconductor(Ca1-2xK2x)(Zn1-xMnx)2As2 with decoupled charge and spin doping.The substitutions of(Ca2+,K+)and(Zn2+,Mn2+)in the parent compound CaZn2As2(space group P3m1(No.164))introduce carriers and magnetic moments,respectively.Doping only Mn into CaZn2As2 does not induce any type of long range magnetic ordering.The ferromagnetic ordering arise can only when K+and Mn2+are simultaneously doped.The res-ulted maximum Curie temperature reaches～7 K,and the corresponding coercive field is～60 Oe.The transport measurements confirm that samples with K and Mn co-doping still behave like a semiconductor.