Ultra-high-density magnetic information storage technologies

Keishi Ohashi, Nobuyuki Ishiwata, Masahiro Yanagisawa, Akinobu Sato, Shinzo Tsuboi, Hirotaka Hokkyo

Research output: Contribution to journalArticlepeer-review


Three approaches used to achieve ultra-high-density recording of 100 Gbit/in2 are discussed. In order to overcome the thermal fluctuation problem of recorded patterns, a write head with Co-Ni-Fe poles has been developed. The Co-Ni-Fe pole generates the strongest write field. The head wrote well in media with a coercivity of 7 kOe, which is sufficiently large for ultra-high-density recording. A narrow gap Co-Ni-Fe head for perpendicular recording has also been developed. The experimental results on contact recording and a double-layer perpendicular medium are also discussed.

Original languageEnglish
Pages (from-to)160-165
Number of pages6
JournalNEC Research and Development
Issue number2
Publication statusPublished - 2000 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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