Microstructural Study of Electroless-Plated CoNiReP/NiMoP Double-Layered Media for Perpendicular Magnetic Recording

Tetsuya Osaka, Hiroshi Matsubara, Takayuki Homma, Satoshi Mitamura, Kazuhiro Noda

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The microstructure of the electroless CoNiReP/NiMoP double-layered media was examined with various methods, focusing upon that of the in-plane anisotropy initial regions of the CoNiReP recording layers, and the origin of the initial region was discussed. It was confirmed that the initial region consists of randomly oriented fcc crystallites with Nirich composition, showing the granular condition, while the upper region with the perpendicular anisotropy consists of perpendicularly oriented hcp crystallites, forming the columnar structure with 20- to 30-nm diameter. It is considered that the formation of the initial region is due to a preferential deposition of Ni onto the NiMoP underlayers, and that the thickness of the initial region changes due to a change in the condition of the NiMoP underlayers, especially that of surface activity and/or morphology at their surfaces.

Original languageEnglish
Pages (from-to)1939-1943
Number of pages5
JournalJapanese journal of applied physics
Volume29
Issue number10
DOIs
Publication statusPublished - 1990 Oct

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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