Pseudo spin-valves with Al or Nb as spacer layer: GMR and search for spin switch behaviour F. Russo, G. Carapella, V. Granata, N. Martucciello and G. Costabile Eur. Phys. J. B, 60 1 (2007) 61-66 Published online: 29 November 2007 DOI: 10.1140/epjb/e2007-00329-6