Effect of palladium nuclei insertion by electroless deposition on magnetic intergranular isolation and read/write characteristics in SmCo5 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: Contribution to journalConference article

Abstract

In order to improve the magnetic intergranular isolation between the magnetic grains in the SmCo5 perpendicular magnetic recording media, the palladium nuclei deposited by an electrochemical process were introduced into a sputter deposition process of the SmCo5 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
Pages (from-to)68-74
Number of pages7
JournalPhysics Procedia
Volume16
DOIs
Publication statusPublished - 2011 Jan 1
Event9th Perpendicular Magnetic Recording Conference, PMRC 2010 - Sendai, Japan
Duration: 2011 May 172011 May 19

Keywords

  • Electroless deposition
  • Perpendicular magnetic recording
  • Read/write(R/W) characteristics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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