Perpendicular Recording Performance of Co-Cr Film Prepared by Newly Developed Sputter-deposition

Abstract

Recording and noise properties were studied by using a ring type head for a Co-Cr medium prepared by a new sputtering method at room temperature with a high Ar pressure of 70 Pa. Reproduced waveform for the medium was a dipulse which suggested that a perpendicular recording mode has been realized.
The new medium exhibited as a high density response performance as that of a conventionally prepared medium, namely, deposited at a high temperature of 250°C with a low Ar pressure of 0.2 Pa. The noise level of the new medium was lower than that of the conventional one. It is suggested that the low noise properties are attributed to an isolated microstructure of the medium.