Local structure investigation on Mn and Co doped TiO2 thin films by x-ray absorption spectroscopy.

Mn and Co doped TiO₂ thin films are prepared by rf magnetron sputtering technique. GIXRD measurements shows anatase phase for pure TiO₂ and Mn doped TiO₂, however mixed anatase and rutile phase for Co doped TiO₂. XANES and EXAFS measurements at dopant and host site confirm the substitution of host site by dopant ions. O K edge measurements and EXAFS results at the dopant site confirms the presence of oxygen vacancies. Ferromagnetism obtained in the doped TiO₂ thin films is attributed to the oxygen vacancy mediated interaction between the TM ions. [ABSTRACT FROM AUTHOR]