Perpendicular magnetic recording hard disk media using ferrite substrate

Yoshihisa Nakamura, Setsuo Yamamoto, Hiroaki Muraoka, Isao Watanabe, Hideo Fujii

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


To serve the needs of high linear bit density recording and high data transfer rate, a new perpendicular recording hard disk media constitution is proposed. In the new hard disk media, a Co-Cr layer is directly deposited on a soft-magnetic Mn-Zn single-crystal ferrite substrate. The ferrite substrate hard disk showed superior high-frequency response to a conventional Co-Cr/Fe-Ni-Nb double-layered hard disk with glass substrate. This improvement in high frequencies is brought about by suppressing the eddy current losses because of high electric resistivity of the ferrite substrate.

Original languageEnglish
Pages (from-to)310-314
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Issue number2-3
Publication statusPublished - 1994 Jun

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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