Superparamagnetic-like behavior in an octanuclear iron cluster A.-L. Barra, P. Debrunner, D. Gatteschi, Ch. E. Schulz and R. Sessoli Europhys. Lett., 35 2 (1996) 133-138 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00544-3