Fabrication of SmCo5-CrTa granular films

A. Sugiyama, I. Koizumi, Y. Egawa, M. Yoshino, J. Hokkyo, T. Asahi, T. Osaka*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A Sm-Co-CrTa granular layer between a Sm-Co continuous layer and a Cu underlayer was prepared in order to improve magnetic properties and magnetic reversal process of Sm-Co perpendicular film. A phase of CrTa alloy in Sm-Co-CrTa layer has a role in control of Cu partial interlayer diffusion between the Sm-Co continuous layer and the Cu underlayer. The Cu diffusion provides the partial crystallization of SmCo5in the continuous layer. Although the perpendicular coercivity of films decreased slightly by introducing the CrTa alloy into Sm-Co layer, the magnetic intergranular exchange interaction in the films was drastically improved. Size of average magnetic cluster became smaller and magnetization reversal process was changed from a wall-motion to a coherent rotation for increasing the thickness ratio of Sm-Co-CrTa/Sm-Co layers. We confirmed that an addition of Sm-Co-CrTa layer is effective to reduce the intergranular exchange interaction in Sm-Co perpendicular films without deterioration of perpendicular magnetic anisotropy.

Original languageEnglish
Article number5467454
Pages (from-to)1699-1701
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 2010 Jun


  • Cr addition
  • High Ku
  • Magnetic reversal process
  • Perpendicular magnetic anisotropy
  • Perpendicular recording media
  • SmCogranular film

ASJC Scopus subject areas

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


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