A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)2Sb2 with decoupled charge and spin dopings

doi:10.1088/1674-1056/ab892e

Abstract We report the successful synthesis of a new diluted magnetic semiconductor (Ca,Na)(Zn,Mn)₂Sb₂. Na and Mn are doped into the parent compound CaZn₂Sb₂, which has the same crystal structure as that of "122" type iron-based superconductor CaFe₂As₂. Na substitution for Ca and Mn substitution for Zn introduce carriers and spins, respectively. Doping Mn atoms alone up to 5% does not induce any type of magnetic ordering. When both Na and Mn are co-doped, a ferromagnetic ordering with maximum T_C～10 K has been observed. Iso-thermal magnetization shows that the coercive field is up to ～245 Oe at 2 K. Below T_C, a negative magneto-resistance with MR ～12% has also been achieved.

Keywords: CaZn₂Sb₂ magnetic ordering Curie temperature

Received: 08 March 2020
Revised: 14 April 2020
Accepted manuscript online:

PACS:	75.50.Pp	(Magnetic semiconductors)
	75.50.Dd	(Nonmetallic ferromagnetic materials)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

Fund: Project supported by the National Key Research & Development Program of China (Grant No. 2016YFA0300402) and the Fundamental Research Funds for the Central Universities, China.

Corresponding Authors: Fanlong Ning
E-mail: ningfl@zju.edu.cn

Cite this article:

Yilun Gu(顾轶伦), Haojie Zhang(张浩杰), Rufei Zhang(张茹菲), Licheng Fu(傅立承), Kai Wang(王恺), Guoxiang Zhi(智国翔), Shengli Guo(郭胜利), Fanlong Ning(宁凡龙) A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)₂Sb₂ with decoupled charge and spin dopings 2020 Chin. Phys. B 29 057507

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A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)2Sb2 with decoupled charge and spin dopings

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A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)₂Sb₂ with decoupled charge and spin dopings