Electrodeposition of highly functional thin films for magnetic recording devices of the next century

Tetsuya Osaka

Research output: Contribution to journalConference articlepeer-review

170 Citations (Scopus)


A review is presented of the recent progress in research and development of soft magnetic films for magnetic recording heads of the future primarily on the basis of the work performed by the author's research group. Films of CoNiFe ternary alloy with high saturation magnetic flux density BS and low coercivity, HC were successfully produced by electrodeposition. A typical film, designed as `HB-CoNiFe', had the composition of Co65Ni12Fe23 (at.%) with BS = 2.0-2.1 T and HC<2 Oe. Properties other than BS and HC were also investigated; namely, magnetostriction, λS, corrosion properties, and film resistivity ρ. The key to the success in obtaining low HC with high BS was to form film with very fine crystals. The inclusion of small amount of sulfur was found to be essential for producing such a film with the desired magnetic properties. The film has been applied to the construction of a new type of merged-GMR head, which is considered as a breakthrough for materializing ultra high-density magnetic recording.

Original languageEnglish
Pages (from-to)3311-3321
Number of pages11
JournalElectrochimica Acta
Issue number20
Publication statusPublished - 2000 Jun 23
Event50st ISE Meeting: Electrochemical Materials Science - Pavia, Italy
Duration: 1999 Sept 51999 Sept 10

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry


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