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

doi:10.1088/1674-1056/ab892e

中国物理B ›› 2020, Vol. 29 ›› Issue (5): 57507-057507.doi: 10.1088/1674-1056/ab892e

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

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)

1 Zhejiang Province Key Laboratory of Quantum Technology and Device and Department of Physics, Zhejiang University, Hangzhou 310027, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

收稿日期:2020-03-08 修回日期:2020-04-14 出版日期:2020-05-05 发布日期:2020-05-05
通讯作者: Fanlong Ning E-mail:ningfl@zju.edu.cn
基金资助:
Project supported by the National Key Research & Development Program of China (Grant No. 2016YFA0300402) and the Fundamental Research Funds for the Central Universities, China.

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

Yilun Gu(顾轶伦)¹, Haojie Zhang(张浩杰)¹, Rufei Zhang(张茹菲)¹, Licheng Fu(傅立承)¹, Kai Wang(王恺)¹, Guoxiang Zhi(智国翔)¹, Shengli Guo(郭胜利)¹, Fanlong Ning(宁凡龙)^1,2

1 Zhejiang Province Key Laboratory of Quantum Technology and Device and Department of Physics, Zhejiang University, Hangzhou 310027, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

Received:2020-03-08 Revised:2020-04-14 Online:2020-05-05 Published:2020-05-05
Contact: Fanlong Ning E-mail:ningfl@zju.edu.cn
Supported by:
Project supported by the National Key Research & Development Program of China (Grant No. 2016YFA0300402) and the Fundamental Research Funds for the Central Universities, China.

摘要/Abstract

摘要： 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.

关键词: CaZn₂Sb₂, magnetic ordering, Curie temperature

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.

Key words: CaZn₂Sb₂, magnetic ordering, Curie temperature

中图分类号: (Magnetic semiconductors)

75.50.Pp

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

顾轶伦, 张浩杰, 张茹菲, 傅立承, 王恺, 智国翔, 郭胜利, 宁凡龙. A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)₂Sb₂ with decoupled charge and spin dopings[J]. 中国物理B, 2020, 29(5): 57507-057507.

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[J]. Chin. Phys. B, 2020, 29(5): 57507-057507.

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

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

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