Electrochemical preparation of soft magnetic CoNiFeS film with high saturation magnetic flux density and high resistivity

M. Takai, K. Hayashi, M. Aoyagi, Tetsuya Osaka

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

A soft magnetic CoNiFeS film as a write head core material for the next generation was prepared by electrodeposition. In this system, thiourea was used as an additive in the CoNiFe ternary alloy plating bath. The most suitable magnetic properties were obtained at the film composition of (Co73Ni12Fe15)99.1S0.9 [atomic percent (a/o)] with a high saturation magnetic flux density (Bs) of 1.7 T, a high resistivity (ρ) of 51 μΩ cm, and a low saturation magnetostriction (λs) of 4.4 × 10-6. The film consisted of fine minute crystal grains 5 to 10 nm in diameter. The S content of ca. 0.9 a/o is believed to be responsible for the formation of small crystal grains with low coercivity and high resistivity.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume144
Issue number7
Publication statusPublished - 1997 Jul

Fingerprint

Magnetic films
magnetic films
Magnetic flux
magnetic flux
flux density
saturation
Thiourea
preparation
Crystals
electrical resistivity
Magnetostriction
Ternary alloys
Thioureas
ternary alloys
thioureas
magnetostriction
Coercive force
plating
Plating
Electrodeposition

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Electrochemical preparation of soft magnetic CoNiFeS film with high saturation magnetic flux density and high resistivity. / Takai, M.; Hayashi, K.; Aoyagi, M.; Osaka, Tetsuya.

In: Journal of the Electrochemical Society, Vol. 144, No. 7, 07.1997.

Research output: Contribution to journalArticle

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