Experimental investigation on γ − Fe2O3 nanoparticles Faraday Rotation: particles size dependence F. Royer, D. Jamon, J. J. Rousseau, V. Cabuil, D. Zins, H. Roux and C. Bovier Eur. Phys. J. AP, 22 2 (2003) 83-87 Published online: 06 May 2003 DOI: 10.1051/epjap:2003027