Write heads with pole tip consisting of high-Bs FeCoAlO films

Shoji Ikeda, I. Tagawa, Y. Uehara, T. Kubomiya, J. Kane, M. Kakehi, A. Chikazawa

Research output: Contribution to journalConference articlepeer-review

17 Citations (Scopus)


We investigated the magnetic properties, corrosion resistance, and microstructure for the sputtered FeCoAlO films, and the properties of write heads that use them for pole tips. The FeCoAlO films have soft magnetic properties as well as magnetic induction Bs ∼ 2.2 T, which is equal to the Bs of pure-Fe. In-plane uniaxial anisotropy for the as-made films is almost unchanged though the magnetic field is applied during annealing, i.e., the magnetic annealing effect is negligible. The films have sufficient magnetic thermal stability and corrosion resistance to withstand magnetic head fabrication processes. For the write heads with pole tips which consist of FeCoAlO films, the overwrite (O/W) and the nonlinear transition shift (NLTS) show about -35 dB and 13%, respectively. Therefore, these FeCoAlO films can be advantageously applied to writing heads.

Original languageEnglish
Pages (from-to)2219-2221
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 I
Publication statusPublished - 2002 Sep
Externally publishedYes
Event2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands
Duration: 2002 Apr 282002 May 2


  • Corrosion resistance
  • FeCoAlO film
  • High magnetic induction
  • Overwrite
  • Soft magnetic properties
  • Thermal stability
  • Write head

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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