Preparation of high magnetic flux density CoNiFeB film by electroless deposition for application to magnetic recording devices

M. Yoshino, Y. Kikuchi, A. Sugiyama, Tetsuya Osaka

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A CoNiFeB soft magnetic thin film with high saturation magnetic flux density (Bs) for use as a magnetic recording head core material or as a soft magnetic underlayer of a double perpendicular magnetic recording medium was prepared by electroless deposition. When the CoNiFeB alloy thin film was deposited on a evaporated Cu (100 nm thick)/glass substrate, the saturated magnetic flux density was found to increase up to 2.0 T by increasing the concentration of FeSO4. The coercivity (Hc) was found to decrease to 6 Oe while the saturated magnetic flux density was maintained higher than 1.8 T by optimizing the concentrations of tartaric acid and citric acid in the electroless plating solution. An X-ray diffraction (XRD) study showed that the intensity of the assigned peak in the bcc (1 1 0) of CoNiFeB film decreased as the concentration of tartaric acid was decreased. Moreover, the coercivity of the CoNiFeB film formed on a NiFe substrate exhibits lower coercivity than that formed on a Cu substrate.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalElectrochimica Acta
Volume53
Issue number2
DOIs
Publication statusPublished - 2007 Dec 1

Fingerprint

Magnetic recording
Electroless plating
Magnetic flux
Coercive force
Substrates
Magnetic thin films
Acids
Citric acid
Citric Acid
X ray diffraction
Glass
Thin films
tartaric acid

Keywords

  • Citric acid
  • CoNiFeB
  • Electroless deposition
  • Soft magnetic film
  • Tartaric acid

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Preparation of high magnetic flux density CoNiFeB film by electroless deposition for application to magnetic recording devices. / Yoshino, M.; Kikuchi, Y.; Sugiyama, A.; Osaka, Tetsuya.

In: Electrochimica Acta, Vol. 53, No. 2, 01.12.2007, p. 285-289.

Research output: Contribution to journalArticle

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