Abstract
The TbFeCoNbN film was studied, which was formed by sputtering in a nitrogen atomsphere. This film was not perpendicular anisotropy, but has high corrosion resistance such as wet corrosion and pitting corrosion. So, a nitride film were formed on the TbFeCoNb magneto-optical recording film. When the nitride film was formed on the TbFeCoNb film, the magneto-optical characteristic such as the Kerr rotation angle became smaller with increasing thickness of the nitride layer. The magneto-optical disk was produced, and its disk characteristics was measured. C/N of 45 dB which was capable of recording the code data, was obtained for the disk, being formed on the nitride layer of 5 nm thickness on the surface of the TbFeCoNb film. The reliability of the disk was estimated with the change of C/N and the jitter width on the disk, using the TbFeCoNbN/TbFeCoNb recording film. When this disk was exposed to 60°C-95%RH for 1000 h, C/N and the jitter width were not changed. The results show that this disk has high reliability.
