Observations on perpendicular magnetic recordings of high recording densities on co-cr films by the colloid-sem method

Kimiyoshi Goto, Tomoaki Sakurai, Osamu Kitakami

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Perpendicular magnetic recordings of 5 to 100 KBPI densities on evaporated Co-24 wt%Cr films of 2200Ǻ in thickness have been observed by the colloid-SEM method and by the conventional magnetic powder pattern technique. The latter technique, using an optical microscope, gives satisfactory results for recording densities of 5 and 10 kBPI. For high recording densities of 50 and 100 kBPI, clear recorded patterns have been successfully obtained by the colloid-SEM method where dried powder patterns are made under external magnetic fields of 200 to 300 Oe applied vertically to the film planes. It is shown that a better recording can be determined from the obtained patterns, even in high-density recordings. Some discussions are given regarding the relation between the single-domain behaviour of columnar grains in the films and obtained recorded patterns.

Original languageEnglish
Pages (from-to)1358-1364
Number of pages7
JournalJapanese journal of applied physics
Volume25
Issue number9 R
DOIs
Publication statusPublished - 1986 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Observations on perpendicular magnetic recordings of high recording densities on co-cr films by the colloid-sem method'. Together they form a unique fingerprint.

  • Cite this