Various double layer media were fabricated by plating 0. 1 mu m thick CoNiReP recording layer onto several kinds of Ni alloy underlayers 0. 05 mu m thick. A higher reproduced voltage was observed for the medium with a softmagnetic NiFeP underlayer. The effect is called 'double layer effect'. Although both the media with NiWP and NiP(pH10) underlayers showed almost the same magnetic properties, a higher reproduced voltage at high densities appeared for the medium with a NiWP underlayer. It turned out to be due to a higher crystallinity of the recording layer for the NiWP double layer. This effect to improve a crystallinity of recording layer is 'underlayer effect'. The quasi-softmagnetic NiWP underlayer has two effects. The highest D//5//0 value of 152kFRPI with a video ring head was obtained for the medium of CoNiReP/NiWP.
|Number of pages||3|
|Journal||IEEE Transactions on Magnetics|
|Publication status||Published - 1987 Sep|
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)