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, Mikiko Saito, N. Ishiwata, Keishi Ohashi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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
Volume36
Issue number5 I
DOIs
Publication statusPublished - 2000 Sep
Externally publishedYes

Fingerprint

Eddy currents
Coercive force
eddy currents
coercivity
recording
high speed
electrical resistivity
shift

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording. / Nonaka, Y.; Honjo, H.; Toba, T.; Saito, S.; Ishi, T.; Saito, Mikiko; Ishiwata, N.; Ohashi, Keishi.

In: IEEE Transactions on Magnetics, Vol. 36, No. 5 I, 09.2000, p. 2514-2516.

Research output: Contribution to journalArticle

Nonaka, Y, Honjo, H, Toba, T, Saito, S, Ishi, T, Saito, M, Ishiwata, N & Ohashi, K 2000, 'Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording', IEEE Transactions on Magnetics, vol. 36, no. 5 I, pp. 2514-2516. https://doi.org/10.1109/20.908490
Nonaka, Y. ; Honjo, H. ; Toba, T. ; Saito, S. ; Ishi, T. ; Saito, Mikiko ; Ishiwata, N. ; Ohashi, Keishi. / Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording. In: IEEE Transactions on Magnetics. 2000 ; Vol. 36, No. 5 I. pp. 2514-2516.
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