Titanium dioxide thin films deposition by direct current hollow cathode magnetron sputtering D. A. Duarte, M. Massi, A. S. da Silva Sobrinho, H. S. Maciel, K. Grigorov and L. C. Fontana Eur. Phys. J. Appl. Phys., 49 1 (2010) 13107 Published online: 26 November 2009 DOI: 10.1051/epjap/2009179