Experimental variations of the ferromagnetic resonance (FMR) recorded on so
ft composite bodies are presented and their interpretation is undertaken. A
successful application is performed for the Kittel expression of the FMR,
initially written for an ellipsoid placed in vacuum, to a magnetic inclusio
n of the composite. This model includes the demagnetizing effects due to th
e magnetic inclusions. (C) 2000 Elsevier Science B.V. All rights reserved.