SQUID measurements of Mn$_{x}$Sc$_{(1-x)}$N and Fe$_{0.1}$Sc$_{0.9}$N Films Grown by Molecular Beam Epitaxy

We report SQUID magnetic measurements on N-rich and N-poor Mn$_{x}$Sc$_{(1-x)}$N and Fe$_{0.1}$Sc$_{0.9}$N films grown on ScN(001)/MgO(001) substrates by radio frequency plasma assisted molecular beam epitaxy. Ferromagnetism is present in both the Mn doped (x ranging from 3 to 15\%) and the Fe doped ScN samples. Measurements on N-poor Mn$_{0.03}$Sc$_{0.97}$N and Mn$_{0.15}$Sc$_{0.85}$N (x=15\%) show Curie temperatures of 383 K and 361 K, respectively. The Fe$_{0.1}$Sc$_{0.9}$N film shows a Curie temperature above 350 K as well. Further studies will be required to determine the origin of the ferromagnetism and the Curie temperature of the remaining Mn$_{x}$Sc$_{(1-x)}$N films. This work is supported by: Seton Hall: University Research Council; Ohio University: DOE-BES Grant No. DE-FG02-06ER46317 and NSF Grant No. 0730257; and UT Austin: NSF Grant Nos. DMR-0605828 and DGE-0549417, Welch Foundation Grant No. F-1191.