Ba(Zn1-2xMnxCox)2As2: A Bulk Form Diluted Magnetic Semiconductor with   n-type Carriers
  We report the synthesis and characterization of bulk form diluted magnetic semiconductors Ba(Zn1-2xMnxCox)2As2 (0 <= x <= 0.15) with a crystal structure identical to that of 122-type Fe-based superconductors. Mn and Co co-doping into the parent compound BaZn2As2 results in a ferromagnetic ordering below TC ~ 80 K. Hall effect measurements indicate that the carrier are n-type with the density of ~10^17/cm3. The common crystal structure and excellent lattice matching between the p-type ferromagnetic (Ba1-yKy)(Zn1-xMnx)2As2, the n-type ferromagnetic Ba(Zn1-2xMnxCox)2As2, the antiferrmagnetic BaMn2As2 and the superconducting Ba(Fe1-xCox)2As2 systems make it possible to make various junctions between these systems through the As layer. 
Huiyuan Man, Cui Ding, Shengli Guo, Guoxiang Zhi, Xin Gong, Quan Wang,   Hangdong Wang, Bin Chen, F.L. Ning
cond-mat.str-el cond-mat.mtrl-sci