(Ca, K)(Zn, Mn)2As2: Ferromagnetic semiconductor induced by decoupled charge and spin doping in CaZn2As2. (1st July 2022)

• Record Type: Journal Article
• Authors: Dong, Jinou; Zhao, Xueqin; Fu, Licheng; Gu, Yilun; Zhang, Rufei; Yang, Qiaolin; Xie, Lingfeng; Ning, Fanlong
• Is Part Of: Journal of semiconductors. Volume 43:Number 7(2022)
• Publication Date: 2022-07-01
• Subjects: CaZn2As2 -- ferromagnetic ordering -- Curie temperature -- diluted magnetic semiconductor; Semiconductors -- Periodicals; 621.38152
• DOI: 10.1088/1674-4926/43/7/072501
• Languages: English
• ISSNs: 1674-4926

Abstract

Abstract: We have successfully synthesized a novel diluted magnetic semiconductor (Ca1−2 x K2 x )(Zn1− x Mn x )2 As2 with decoupled charge and spin doping. The substitutions of (Ca 2+, K + ) and (Zn 2+, Mn 2+ ) in the parent compound CaZn2 As2 (space group P m 1 (No. 164)) introduce carriers and magnetic moments, respectively. Doping only Mn into CaZn2 As2 does not induce any type of long range magnetic ordering. The ferromagnetic ordering arise can only when K + and Mn 2+ are simultaneously doped. The resulted 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.