57Co-emission Mössbauer study on diluted magnetic semiconductor TiO2 films.

Rutile-type Co _x Ti_{1 − x} O_{2 − d} laser deposited on alumina substrate was studied after ⁵⁷Co doping, using emission Mössbauer spectroscopy. It was found that although under certain conditions (i.e., which result in high conductivity) the thin rutile layers showed magnetooptical effect, the Mössbauer probe did not reveal any magnetic splitting, but showed paramagnetic Co^{3 +} (Fe^{3 +} ) in the films of low electric resistance. This supports that these samples have carrier induced magnetism which is also connected to the defect structure of the rutile films. [ABSTRACT FROM AUTHOR]