Research Papers in Physics and Astronomy


Date of this Version


Document Type



JOURNAL OF APPLIED PHYSICS 109, 07C311 (2011); doi:10.1063/1.3544478


Copyright 2011 American Institute of Physics. Used by permission.


We have prepared and investigated thin films of EuO doped with the rare-earth element cerium. X-ray diffraction, scanning electron microscopy, and energy dispersive x-ray spectroscopy were used to determine the quality of these films prepared by pulsed laser deposition. Ce doping leads to an enhanced Curie temperature near 150 K, close to that seen for oxygen-deficient EuO1-x. However, the magnetization of Ce-doped EuO exhibits differences from that observed for Gd-doped and oxygen-deficient samples. The high-resolution angular-resolved photoemission from Ce-doped EuO reveals filling of conduction-band states near the X point. This indicates that the band gap in EuO is indirect, and that at 2% doping Ce-doped EuO1-x is at least semimetallic.