Spin resonance in soft magnetic composite materials : a surprising effect of the magnetic load A. Chevalier, F. Le Floc'h, J.L. Mattei, Ph. Talbot et M. Le Floc'h J. Phys. IV France, 08 PR2 (1998) Pr2-417-Pr2-420 DOI: 10.1051/jp4:1998297