Non-Langevin behaviour of the uncompensated magnetization in nanoparticles of artificial ferritin C. Gilles, P. Bonville, K. K.W. Wong and S. Mann Eur. Phys. J. B, 17 3 (2000) 417-427 Published online: 15 October 2000 DOI: 10.1007/s100510070121