1996 Volume 20 Issue 2 Pages 133-136
In principle, it is possible to realize high-density recording on perpendicular magnetic recording media, It is expected that these media will be developed for recording use with high-definition television (HDTV) and high-quality video multimedia. A Co-Cr-Ta tape with a smooth base sheet was prepared in order to study the possibility of recording by facing-targets sputtering (FTS). The base sheet surface was observed by atomic force microscopy (AFM). The recording characteristics of Co-Cr-Ta tapes with smooth and standard base sheets were investigated at short wavelengths by using a drum tester (a system that evaluates the head and medium). The output with the smooth version was 3.2 dB higher at 170 kFRPI than with the standard one. A C/Nt value of 52.3 dB was obtained. The magnetization recorded on the smooth version at 250 kFRPI was clearly observed as a magnetic force microscopy (MFM) image.
