EFFECTS OF AN UNDERLAYER ON RECORDING CHARACTERISTICS OF ELECTROLESS PLATED PERPENDICULAR RECORDING FLEXIBLE MEDIA.

Tetsuya Osaka, H. Matsubara, K. Yamanishi, H. Mizutani, F. Goto

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2356-2358
Number of pages3
JournalIEEE Transactions on Magnetics
VolumeMAG-23
Issue number5
Publication statusPublished - 1987 Sep

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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