NOL specular spin-valve heads using an ultrathin CoFe free layer

Hideaki Fukuzawa, Katsuhiko Koi, Hiroshi Tomita, Hiromi Niu Fuke, Yuzo Kamiguchi, Hitoshi Iwasaki, Masashi Sahashi

Research output: Contribution to journalConference article

22 Citations (Scopus)

Abstract

This paper reports the film and head performance of specular spin valves with nano-oxide layer (NOL-SPSV). A large MR ratio of 17% was obtained by using an ultrathin CoFe free layer with a high conductance Cu layer, which decreases the sense current field of a free layer and brings good soft magnetic characteristics. Prototype heads with a read track width of 0.47-0.61 μm were fabricated by using NOL-SPSV films with an MR ratio of 14-15%, Hua∼400 Oe, and Hc∼5 Oe. High output signal voltage of 8-11 mV/μm was realized in the NOL-SPSV heads.

Original languageEnglish
Pages (from-to)208-212
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume235
Issue number1-3
DOIs
Publication statusPublished - 2001 Oct 1
EventProceedings of the 5th Perpendicular Magnetic Recording Conference (PMRC 2000) - Sendai, Japan
Duration: 2000 Oct 232000 Oct 26

Keywords

  • Free layer
  • Head performance
  • NOL
  • Specular spin valve

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Fukuzawa, H., Koi, K., Tomita, H., Fuke, H. N., Kamiguchi, Y., Iwasaki, H., & Sahashi, M. (2001). NOL specular spin-valve heads using an ultrathin CoFe free layer. Journal of Magnetism and Magnetic Materials, 235(1-3), 208-212. https://doi.org/10.1016/S0304-8853(01)00339-0