Magnetic properties of iron oxide nanoparticles investigated by nanoSQUIDs Carmine Granata, Roberto Russo, Emanuela Esposito, Antonio Vettoliere, Maurizio Russo, Anna Musinu, Davide Peddis and Dino Fiorani Eur. Phys. J. B, 86 6 (2013) 272 Published online: 17 June 2013 DOI: 10.1140/epjb/e2013-40051-2