PT Unknown AU Freude, W Stalzer, H Cosceev, A Sürgers, C v. Löhneysen, H Brosi, J Chakam, G TI Proximity-Effekt in supraleitenden Nb/Ag- und Nb/Ag/Fe-Schichtpaketen SE Proceedings of the Nuclear Physics Spring Meeting, University of Cologne, Germany, March 8 - 12, 2004 PY 2004 VL 2004 IS 1 LA english ER