Recording characteristics of perpendicular media deposited on a ferrite disk substrate

H. Muraoka, T. Shoji, I. Watanabe, Y. Sugita, Y. Nakamura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A soft-magnetic ferrite disk substrate was investigated as an underlayer of perpendicular double layer hard disk media for single-pole heads. Although a soft-magnetic thin-film is generally used for the underlayer, concern about the eddy current effect for a metallic underlayer in high-frequency operations. In order to avoid the eddy current, Co-Cr perpendicular media were prepared on the Mn-Zn ferrite substrate to examine their read/write performance. Experimental results with a single-pole writing head and an MR head showed that the ferrite substrate disk had better writing sensitivity and frequency response owing to its large volume and electrical resistivity.

Original languageEnglish
Pages (from-to)55-58
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume193
Issue number1-3
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Eddy current effect
  • Ferrite substrates
  • Perpendicular magnetic recording
  • Perpendicular media

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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