The Influence of Co Content on the Corrosion Resistance of Sputter-Deposited TbFeCo Thin Films in Aqueous Environments

Noboru Akao, Tomoya Katc, Katsuhisa Sugimoto, Takashi Sasaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The influence of Co content on the corrosion resistance of sputter-deposited TbFeCo alloy films for magneto-optical recording media was investigated by means of an immersio corrosion test, electrochemical measurement, x-ray photoelectron spectroscopy, and transmission electron microscopy. The corrosion resistance of the alloy films in chloride solutions increased with increasing Co content. This is due to the decrease in the growth rate of pits. The stability of passive films on the surface of the alloys increased with increasing Co content. The number of pits, however, increased with increasing Co content. Colonies of microcrystals were locally formed in an amorphous alloy matrix with increasing Co content. Such colonies are presumed to be responsible for the increase in the number of pits.

Original languageEnglish
Pages (from-to)1199-1205
Number of pages7
JournalJournal of the Electrochemical Society
Volume141
Issue number5
DOIs
Publication statusPublished - 1994

Keywords

  • corrosion resistance
  • dissolving
  • electrochemistry
  • magnetic thin films
  • passivation solid structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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