Cu2(Zn,Mn)(Sn,Al)Se4: A diluted magnetic semiconductor with decoupled charge and spin doping

•Cu2(Zn,Mn)(Sn,Al)Se4 are new bulk form DMSs with decoupled charge and spin doping.•Only when Mn and Al are doped simultaneously can ferromagnetic ordering form.•Over or less of carriers for fix Mn concentration are both harmful to ferromagnetism.•Cu2(Zn,Mn)(Sn,Al)Se4 have a negative magneto-resista...

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Published in:Journal of magnetism and magnetic materials 2021-10, Vol.536, p.168064, Article 168064
Main Authors: Zhi, Guoxiang, Guo, Shengli, Zhang, Rufei, Zhao, Yao, Fu, Licheng, Gu, Yilun, Wang, Kai, Zhang, Haojie, Zhao, Xueqin, Dong, Jinou, Xie, Lingfeng, Ning, Fanlong
Format: Article
Language:English
Subjects:
Aluminum
Copper zinc tin selenide
Cu2ZnSnSe4
Diluted magnetic semiconductor
Dilution
Doping
Ferromagnetism
Magnetic semiconductors
Manganese
Substitutes
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Summary:•Cu2(Zn,Mn)(Sn,Al)Se4 are new bulk form DMSs with decoupled charge and spin doping.•Only when Mn and Al are doped simultaneously can ferromagnetic ordering form.•Over or less of carriers for fix Mn concentration are both harmful to ferromagnetism.•Cu2(Zn,Mn)(Sn,Al)Se4 have a negative magneto-resistance effect. We report the successful synthesis and characterization of a diluted magnetic semiconductor Cu2(Zn,Mn)(Sn,Al)Se4 with stannite structure. 15% of Mn doping into the quaternary semiconductor Cu2ZnSnSe4 does not induce any type of magnetic ordering. Only when Al is codoped with Mn, is ferromagnetic transition observed in Cu2(Zn,Mn)(Sn,Al)Se4. Our results demonstrate that Mn substitution for Zn introduces local moments, while Al substitution for Sn introduces carriers, respectively. Both spins and carriers are crucial in the formation of ferromagnetic ordering in Cu2(Zn,Mn)(Sn,Al)Se4.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2021.168064