Abstract: The RE-TM magneto-optical recording film and protective film were prepared by RF sputtering or reactlve RF sputtering.By measuring from the film side and the substrate side,we studied the experiments of the magneto-optical disk material with protective films against adverse circumstances.The aging test and temperature dependence of these samples show that the TbFeCo films with AlN or AlSiN protective films have the excellent ability against adverse circumstances,and that thev can be used for magneto-optical disks with a wide temperature range.

Key words: magneto-optical disk, temperature stability, against adverse circumstance, aging test