Study of the Gyromagnetic Resonance Damping in Relaxing Rare Earth Substituted YGd2Fe5O12 Garnets T. Taffary, H. Pascard, D. Autissier et F. Boust J. Phys. IV France, 07 C1 (1997) C1-419-C1-420 DOI: 10.1051/jp4:19971169