Fabrication of SmCo5 double-layered perpendicular magnetic recording media

Tetsuya Osaka*, Yuki Yamashita, Junichi Sayama, Toru Asahi, Jun Ariake, Kiko Harada, Kazuhiro Ouchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We fabricated SmCo5 double-layered perpendicular magnetic recording media with high perpendicular magnetic anisotropy for realizing ultra high density recording. A double-layered medium with a Ru buffer layer introduced between a Cu/Ti intermediate layer and a Co-Zr-Nb soft magnetic underlayer exhibited high perpendicular magnetic anisotropy, whereas that without the Ru buffer layer did not. Auger electron spectroscopy revealed that the Ru buffer layer inhibited interdiffusion between the Cu/Ti intermediate layer and the Co-Zr-Nb soft magnetic underlayer. We report here for the first time the read-write characteristics of SmCo5 double-layered perpendicular magnetic recording media. The medium noise was small in the medium with a Sm-Co layer deposited under high Ar gas pressure owing to small magnetic clusters.

Original languageEnglish
Pages (from-to)2109-2111
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 2007 Jun


  • Cu/Ti intermediate layer
  • Double-layered medium
  • Perpendicular magnetic recording
  • Ru buffer layer
  • SmCo thin film

ASJC Scopus subject areas

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


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