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Structure dependent magnetic properties of Co implanted TiO2

Yildirim, O.; Cornelius, S.; Vinnichenko, M.; Butterling, M.; Wagner, A.; Smekhova, A.; Potzger, K.


Magnetic and structural properties of amorphous and anatase TiO2 thin films implanted with Co ions have been investigated. Implantation induced defects have been characterized using positron annihilation spectroscopy (PAS) while for magnetic chracterization we have used magnetometry. Up to a doping level of 2.5 at.%, only a paramagnetic contribution has been detected. The susceptibility strength , however, depends on the structure of the unimplanted film. Results on the formation of secondary phases at higher doping level will also be presented.

This work is supported by the Initiative and Networking Fund of the German Helmholtz Association, Helmholtz-Russia Joint Research Group HRJRG-314, and the Russian Foundation for Basic Research, RFBR #12-02-91321-SIG_а, Start: 01.02.2012

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