Enhancement of room temperature ferromagnetism in N-doped TiO2-x rutile: Correlation with the local electronic properties

Drera, G.; Mozzati, M. C.; Galinetto, P.; Diaz-Fernandez, Y.; Malavasi, L.; Bondino, F.; Malvestuto, M.; Sangaletti, L.
July 2010
Applied Physics Letters;7/5/2010, Vol. 97 Issue 1, p012506
Academic Journal
The magnetic and electronic properties of ferromagnetic undoped and N-doped TiO2-x rutile have been probed by soft x-ray spectroscopies. Upon N doping, a fivefold enhancement of the saturation magnetization is observed. Apparently, this enhancement is not related to an increase in oxygen vacancies, rather to additional in-gap states, arising from the replacement of O with N atoms in the rutile structure that can provide more favorable conditions for the onset of ferromagnetic ordering.


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