We have fabricated Ti0.95-xNbxCo0.05O 2 thin films by the pulsed laser deposition technique. Carrier density was found to be almost identical to the Nb concentration up to x = 0.06, indicating that doped Nb atoms generate carriers with >80% efficiency. In this doping range, magneto-optical properties were significantly enhanced by Nb-doping. The remanent Faraday rotation at a wavelength of 405 nm was as high as 5.6 × 103 deg/cm, which is approximately one order of magnitude higher than that of a film free of Nb-doping. The present results support the hypothesis that conduction electrons play an essentialrole in the ferromagnetism of Co-doped TiO2.
|Journal||Japanese Journal of Applied Physics, Part 2: Letters|
|Publication status||Published - 2006|
- Diluted magnetic semiconductor
- Pulsed laser deposition
- Thin film
ASJC Scopus subject areas
- Physics and Astronomy(all)