YTTERBIUM SUBLATTICE CONTRIBUTION TO THE FARADAY ROTATION OF YTTERBIUM IRON GARNET M. Guillot, H. Le Gall, A. Marchand, A. Barlet, M. Artinian and J. Ostoréro J. Phys. Colloques, 49 C8 (1988) C8-961-C8-962 DOI: 10.1051/jphyscol:19888439