Noise reduction in CoCrTaNiPt/Cr longitudinal media with new Co co-precipitated NiP/Al substrate

S. Yoshimura, D. D. Djayaprawira, Tham Kim Kong, Y. Masuda, H. Shoji, M. Takahashi

    Research output: Contribution to journalConference article

    Abstract

    For the purpose of reducing grain size and grain size distribution while maintaining intergranular interactions of magnetic grains in CoCrTaNiPt/Cr media, a small amount of oxygen exposure onto a normal NiP and a Co co-precipitated NiP (Co-NiP)/Al-alloy substrates was used. Oxygen exposure was used for the purpose of increasing the density of nucleation sites. The dependence of media microstructure and R/W performance on oxygen exposure and Co concentration was examined. It was found that utilization of exposure of a small amount of oxygen gas onto a normal NiP and Co-NiP/Al-alloy substrates effectively reduced the grain size and its distribution. As a result, media noise was effectively reduced by about 10% and signal to noise ratio was improved by 1 dB.

    Original languageEnglish
    JournalDigests of the Intermag Conference
    Publication statusPublished - 2000 Jan 1
    Event2000 IEEE International Magnetics Conference-2000 IEEE INTERMAG - Toronto, Ont, Can
    Duration: 2000 Apr 92000 Apr 13

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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  • Cite this

    Yoshimura, S., Djayaprawira, D. D., Kong, T. K., Masuda, Y., Shoji, H., & Takahashi, M. (2000). Noise reduction in CoCrTaNiPt/Cr longitudinal media with new Co co-precipitated NiP/Al substrate. Digests of the Intermag Conference.