Vortex pinning in superconducting Nb thin films deposited on nanoporous alumina templates W. Vinckx, J. Vanacken, V. V. Moshchalkov, S. Mátéfi-Tempfli, M. Mátéfi-Tempfli, S. Michotte and L. Piraux Eur. Phys. J. B, 53 2 (2006) 199-203 Published online: 04 October 2006 DOI: 10.1140/epjb/e2006-00358-7