Epitaxial ferromagnetic films of Cr-doped TiO2 anatase (CrxTi1-xO2-x/2) were grown on LaA1O3(001) using oxygen-plasma assisted molecular beam epitaxy. Cr K-shell x-ray absorption near-edge spectroscopy shows that the formal oxidation state of Cr is +3 throughout the films with no evidence for either elemental Cr or half-metallic CrO2. Cr is found to substitute for Ti in the lattice with uniform distribution throughout the doped region of the film. The Cr-doped anatase films exhibit room temperature ferromagnetism aligned in-plane with a saturation magnetization of ~0.6 µB/Cr atom.
Revised: August 18, 2014 |
Published: February 15, 2005
Citation
Droubay T.C., S.M. Heald, V. Shutthanandan, S. Thevuthasan, S.A. Chambers, and J. Osterwalder. 2005.Cr-doped TiO2 Anatase- A Ferromagnetic Insulator.Journal of Applied Physics 97.PNNL-SA-42652.