Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

Y. Nonaka*, H. Honjo, T. Toba, S. Saito, T. Ishi, M. Saito, N. Ishiwata, K. Ohashi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)


We have developed a Co-Ni-Fe write head with a short yoke length for high-speed recording. By reducing the yoke length to 9.5 μm, the eddy currents induced in a yoke with a relatively low resistivity (0.2 μΩm) were reduced. The head of this short yoke had good write performance for a medium with a coercivity of 400 kA/m (5000 Oe) at frequencies up to 250 MHz (the overwrite less than - 30 dB, and nonlinear transition shift less than 7%).

Original languageEnglish
Pages (from-to)2514-2516
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 I
Publication statusPublished - 2000 Sept
Externally publishedYes
Event2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada
Duration: 2000 Apr 92000 Apr 12


  • Eddy currents
  • High-Bs material
  • High-speed recording
  • Short yoke length
  • Write head

ASJC Scopus subject areas

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


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