The structure of electroless cobalt alloy films for perpendicular magnetic recording media

Ichiro Koiwa, Hiroshi Matsubara, Tetsuya Osaka

研究成果: Article査読

20 被引用数 (Scopus)

抄録

Two types of electroless Co alloy films, Co40.1-Ni44.2-Re6.0-P9.7and Co23.6-Ni58.5-Re5.3-Mn0.2-P12.4, were prepared for perpendicular magnetic recording media. The correlation between their structure and magnetic properties was investigated and discussed as a function of film thickness. The magnetic properties of these two types of films showed different patterns of dependence with respect to the film thickness. The Co-Ni-Re-P alloy film gave a higher He(⊥) (perpendicular coercivity) in regions where it was very thin; on the other hand, the Co-Ni-Re-Mn-P alloy film displayed a lower He(⊥) at the initial film thickness. The composition was observed with AES measurements to be nearly independent of film thickness. The clear columnar structure of both types of films was confirmed by scanning electron microscopy (SEM) and especially by transmission electron microscopy (TEM) observations. Only the reflection high energy electron diffraction (RHEED) patterns for both types of film clearly showed different dependence patterns with respect to the film thickness. The Co-Ni-Re-P film displayed a very highly c-axis oriented structure even at the initial thin film stage. On the other hand, the Co-Ni-Re-Mn-P film showed a dependence of the degree of c-axis orientation on the film thickness, which increased with film thickness. The differences in magnetic properties as a function of thickness were assumed to be due to the degrees of c-axis orientation and change in magnetic domain structure.

本文言語English
ページ(範囲)685-689
ページ数5
ジャーナルJournal of the Electrochemical Society
133
4
DOI
出版ステータスPublished - 1986 4

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

フィンガープリント

「The structure of electroless cobalt alloy films for perpendicular magnetic recording media」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル