XPS studies of room temperature magnetic Co-doped SnO2 deposited on Si

Five atomic percentage Co-doped SnO2 (Sn0.95Co0.05O2) thin films have been deposited on (1 0 0) Si substrates by pulsed laser deposition. The Sn0.95Co0.05O2 thin films with rutile-structure on (1 0 0) Si substrates could be well deposited under the appreciate deposition parameters. The Sn0.95Co0.05O2 thin film has good room temperature magnetic property with the saturated magnetic moment (ms) of 1.3 μB/Co at 293 K. The X-ray photoelectron spectroscopy (XPS) measurements for the Sn0.95Co0.05O2 thin film on Si predicated that Co has oxidation states of +3. The good magnetic property of the Co-doped SnO2 may be deduced the exchange between Co3+ and Co3+ through the oxygen vacancy.