(Sr,Na)(Zn,Mn)2As2: A new diluted ferromagnetic semiconductor with the hexagonal CaAl2Si2 type structure

Abstract

A new diluted ferromagnetic semiconductor (Sr,Na)(Zn,Mn)2As2 is reported, in which charge and spin doping are decoupled via Sr/Na and Zn/Mn substitutions, respectively, being distinguished from classic (Ga,Mn)As where charge & spin doping are simultaneously integrated. Different from the recently reported ferromagnetic (Ba,K)(Zn,Mn)2As2, this material crystallizes into the hexagonal CaAl2Si2-type structure. Ferromagnetism with a Curie temperature up to 20 K has been observed from magnetization. The muon spin relaxation measurements suggest that the exchange interaction between Mn moments of this new system could be different to the earlier DMS systems. This system provides an important means for studying ferromagnetism in diluted magnetic semiconductors.

18 Pages 4 Figures

References in corpus (5)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• The superconductivity at 18 K in LiFeAs system
• Ferromagnetism in the Mott insulator Ba2NaOsO6
• Curie point singularity in the temperature derivative of resistivity in (Ga,Mn)As

Cited by in corpus (1)

• Local atomic and magnetic structure of dilute magnetic semiconductor (Ba,K)(Zn,Mn)${}_2$As${}_2$