抄録
The application of magnetic films prepared by the oblique incident evaporation, High Incident Nucleation (HIN) method, for micro cassette music tapes has been examined. The following results have been obtained.
1) The coercive force and the gradient of hysteresis curve, (dΦ/dH)Hc,of single layer films take the maximum values at 1000−1500 Å in thickness, and decrease as the film thickness increases.
2) The multilayer films composed of Al layers and Co-30 at%Ni layers being deposited alternately show the superior magnetic properties even with thicker films.
3) As-deposited films show the large fluctuation of the reproduced output level. By polishing the film surface, it is improved and higher values of the reproduced output are obtained. These improve-ments are due to decreasing of the spacing-loss between recording head and the magnetic film surface.
4) Samples prepared by the improved processes mentioned above, have the coercive force of more than 600 Oe and exhibit the recording frequency characteristics equal or more superior to those of “metal tape”.
