@article{oai:nagoya.repo.nii.ac.jp:00012289, author = {Miyazaki, H. and Im, H. J. and Terashima, K. and Yagi, S. and Kato, M. and Soda, K. and Ito, T. and Kimura, S.}, issue = {23}, journal = {APPLIED PHYSICS LETTERS}, month = {Jun}, note = {We report the fabrication of single-crystalline La-doped EuO thin films with a Curie temperature (TC) of about 200 K, the highest among rare-earth compounds without transition metals. From first-principle band calculation and x-ray diffraction measurement, the observed increase in TC cannot be explained only by the increase in hybridization intensity due to lattice contraction and the increase in up-spin electrons of the Eu 5d state caused by the electron doping. Hybridization between the Eu 4f and donor states and/or Ruderman–Kittel–Kasuya–Yoshida interaction mediated by the doped La 5d state is a possible origin of the increase in TC.}, pages = {232503--232503}, title = {La-doped EuO: A rare earth ferromagnetic semiconductor with the highest Curie temperature}, volume = {96}, year = {2010} }