Recording characteristics of electroless-plated CoNiReP/NiWP double layers

H. Matsubara, S. Mitamura, K. Noda, Tetsuya Osaka, F. Goto

Research output: Contribution to journalArticle

Abstract

Electroless-plated CoNiReP/NiWP double-layer films were investigated as perpendicular magnetic recording media for flexible disks. The magnetic properties of a CoNiReP recording layer, such as a saturation magnetization (Ms) value and squareness ratio of perpendicular hysteresis loops (SQR(⊥)), were changed by NiWP underlayers. The reproduced output voltage of CoNiReP/NiWP flexible disks at low recording density with a ring-type head increased with Ms values of the recording layer and underlayer. The D50 value of 172 kFRPI is attained by the highest SQR(⊥) medium of the double-layer evaluated with a 0.20-μm gap length Sendust ring-type head. This may be mainly due to large perpendicular anisotropy of the top region of the recording layer, which is improved by the underlayer addition. The experimental methods and the results are presented.

Original languageEnglish
Pages (from-to)276-281
Number of pages6
JournalIEEE translation journal on magnetics in Japan
Volume5
Issue number3
DOIs
Publication statusPublished - 1990 Mar

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Magnetic recording
Saturation magnetization
Hysteresis loops
Magnetic properties
Anisotropy
Electric potential

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Recording characteristics of electroless-plated CoNiReP/NiWP double layers. / Matsubara, H.; Mitamura, S.; Noda, K.; Osaka, Tetsuya; Goto, F.

In: IEEE translation journal on magnetics in Japan, Vol. 5, No. 3, 03.1990, p. 276-281.

Research output: Contribution to journalArticle

Matsubara, H. ; Mitamura, S. ; Noda, K. ; Osaka, Tetsuya ; Goto, F. / Recording characteristics of electroless-plated CoNiReP/NiWP double layers. In: IEEE translation journal on magnetics in Japan. 1990 ; Vol. 5, No. 3. pp. 276-281.
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