Formation of Pd nanocluster seeds by electrochemical process for control of magnetic properties in Co/Pd multilayered film

Jun Kawaji, Mutsumi Tanaka, Koji Kimura, Toru Asahi, Takayuki Homma, Tetsuya Osaka

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Pd cluster seeds for a double-layered perpendicular magnetic recording medium composed of a Co/Pd multilayered film and a CoZrNb soft magnetic underlayer (SUL) were fabricated with an electrochemical treatment. By immersing the SUL into an aqueous PdCl 2 solution, the substitution of Pd for Co at the surface of the SUL took place, which was caused by the difference in electrochemical redox potential between Pd and Co. Uniformly distributed Pd clusters with 8 nm in diameter were successfully formed with the treatment for the optimized duration. Use of the Pd clusters as the seeds for deposition of the Co/Pd multilayered film increased the perpendicular coercivity and reduced the size of magnetic cluster of the film. These results suggested that the Pd cluster seeds led to the formation of magnetically isolated Co/Pd multilayered grains, improving the magnetic properties of Co/Pd multilayered film.

Original languageEnglish
Pages (from-to)2473-2475
Number of pages3
JournalIEEE Transactions on Magnetics
Volume40
Issue number4 II
DOIs
Publication statusPublished - 2004 Jul 1

Keywords

  • Co/Pd multilayered film
  • Electrochemical treatment
  • Island structure
  • Pd cluster seeds

ASJC Scopus subject areas

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

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