A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)2Sb2 with decoupled charge and spin dopings
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 TC ∼ 10 K has been observed. Iso-thermal magnetization shows that the coercive field is up to ∼ 245 Oe at 2 K. Below TC, a negative magneto-resistance with MR ∼ 12% has also been achieved. * Project supported by the National Key Research & Development Program of China (Grant No. 2016YFA0300402) and the Fundamental Research Funds for the Central Universities, China.
- Publication:
-
Chinese Physics B
- Pub Date:
- May 2020
- DOI:
- 10.1088/1674-1056/ab892e
- Bibcode:
- 2020ChPhB..29e7507G
- Keywords:
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- CaZn2Sb2;
- magnetic ordering;
- Curie temperature;
- 75.50.Pp;
- 75.50.Dd;
- 75.30.Kz