SmCO5-based thin films with high magnetic anisotropy for perpendicular magnetic recording

Junichi Sayama*, Kazuki Mizutani, Yuki Yamashita, Toru Asahi, Tetsuya Osaka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


An investigation was carried out on the effects of the addition of Cu and the thickness of the SmCo5 -based thin film with perpendicular magnetic anisotropy upon its magnetic properties, with the aim of reducing the Cu/Ti underlayer thickness. As a result, the Cu/Ti under-layer thickness necessary to obtain the squareness ratio of unity was successfully reduced from 125 to 50 nm. Moreover, for the SmCo5 double-layered perpendicular magnetic recording media with a CoZrNb soft magnetic underlayer, the Cu/Ti underlayer thickness was further reduced to 35 nm. However, the magnetic cluster size and the values of coercivity and saturation field of the SmCo5 media were found to be too large. Thus, we recognized the need for adjusting the cluster size and the magnetic properties to appropriate values, and also the need for investigating the possibility of using this material as patterned media or thermally assisted recording media.

Original languageEnglish
Pages (from-to)3133-3135
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2005 Oct


  • Cu addition
  • Cu/Ti underlayer
  • Perpendicular magnetic anisotropy
  • Perpendicular magnetic recording medium
  • SmCo thin film

ASJC Scopus subject areas

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


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