Effect of palladium nuclei insertion by electroless deposition on magnetic intergranular isolation and read/write characteristics in SmCo 5 perpendicular magnetic recording media

Atsushi Sugiyama, Yuko Egawa, Isao Koizumi, Masahiro Yoshino, Jiro Hokkyo, Toru Asahi, Takanori Kiya, Jun Ariake, Kazuhiro Ouchi, Tetsuya Osaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In order to improve the magnetic intergranular isolation between the magnetic grains in the SmCo 5 perpendicular magnetic recording media, the palladium nuclei deposited by an electrochemical process were introduced into a sputter deposition process of the SmCo 5 film. A few nanometer size Pd nuclei were electrochemically deposited on the sputtered Cu underlayer by a displacement deposition (chemical plating). The sizes of Pd nuclei were controlled by adjusting the Pd ion concentration in electrolyte solutions. The magnetic domain size in Sm-Co layer deposited on Pd nuclei / Cu / Ti underlayer became smaller and the magnetization reversal process was changed from the wall motion to the coherent rotation. Moreover, the read/write characteristics were improved at higher linear recording densities.

Original languageEnglish
Title of host publicationPhysics Procedia
Number of pages7
Publication statusPublished - 2011
Event9th Perpendicular Magnetic Recording Conference, PMRC 2010 - Sendai, Japan
Duration: 2011 May 172011 May 19


Other9th Perpendicular Magnetic Recording Conference, PMRC 2010



  • Electroless deposition
  • High K
  • Perpendicular magnetic recording
  • Read/write(R/W) characteristics
  • SmCo thin film

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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