Dynamic magnetic behaviour of interacting /spl gamma/-Fe/sub 2/O/sub 3/ nanoparticles dispersed in epoxy resin

The dynamical behaviour of /spl gamma/-Fe/sub 2/O/sub 3/ particles synthesized by a microemulsion route, with an average diameter of 7 nm and dispersed in an epoxy-resin at different concentrations, has been investigated by a.c. magnetic susceptibility measurements (8