Ferromagnetic V-doped SnO2 thin films

V-doped SnO2 thin films have been fabricated by pulsed laser deposition technique on various types of substrates. The distribution of V atoms over the whole thickness of the films is rather uniform. While V:SnO2 films on R-cut Al2O3 substrate are paramagnetic, V:SnO2 films on either LaAlO3 or SrTiO3 substrates are ferromagnetic above room temperature. V:SnO2 films on LaAlO3 substrates could reach a large magnetic moment of about 3μB/impurity atom.