An Extremely High Coercivity in Cu Doped Bi,Ga: DyIG Films for Magneto-optical Recording

Bi, Ga : DyIG and Cu doped Bi, Ga : DyIG films on glass substrates have been prepared by the pyrolysis method, and their coercive force (H_c) and compensation temperature were measured. An extremely high H_c value of 13kOe at room temperature was obtained in Cu doped Bi, Ga : DyIG films.