| Abstract
| - We report the successful synthesis and characterization of a new layered diluted magnetic semiconductor (DMS) La(Zn,Mn,Cu)AsO which is isostructural to Fe-based “1111” superconductor. Mn and Cu are codoped into the same Zn sites to provide local moments and carriers, respectively. A ferromagnetic transition with the highest TC of ∼ 8 K has been observed for $x = 0.150$ from magnetization measurements. Iso-thermal magnetization plots show that the compound has a coercive field, ∼ 500 Oe, much smaller than that in (La,Ba)(Zn,Mn)AsO. The resistivity of all samples display semiconducting behavior with the doping level up to 15%.
|
