Magnetic Properties of EuO Thin Films Doped with Transition Metal

EuO films were doped with Co, Ag, or Au and their characteristics studied. These results were then compared with EuO films containing either additional Fe or Eu. It was found that films containing a transition metal had a higher Curie temperature than those containing additional Eu, and the magnetization of films doped with Ag or Fe had similar temperature dependence (a nearly linear decrease at T
^3/2
). Two Curie temperatures were observed in films doped with Co or Au, indicating two magnetic phases.