AMORPHOUS RARE EARTH-TRANSITION METAL FILMS FOR MAGNETO-OPTICAL STORAGE H. Heitmann, M. Hartmann, M. Rosenkranz et H.J. Tolle J. Phys. Colloques, 46 C6 (1985) C6-9-C6-18 DOI: 10.1051/jphyscol:1985602