Dynamic properties of a system of cobalt nanoparticles P. C. Fannin, A. Slawska-Waniewska, P. Didukh, A. T. Giannitsis and S. W. Charles Eur. Phys. J. AP, 17 1 (2002) 3-9 Published online: 15 January 2002 DOI: 10.1051/epjap:2001012