Perpendicular magnetic recording medium

Abstract

Abstract PURPOSE:To magnetically separate crystal grains from each other and obtain an ultra-high density magnetic recording medium, by further adding to a Co-Cr alloy at least one of hafnium and tungsten as a third element. CONSTITUTION:Not larger than 40wt% at least one of Hf and W is further added to a Co-Cr alloy. If the amount of addition of Hf or W exceeds 40wt%, the resultant film greately lowers in crystallizability and suddenly deteriorates in perpendicular magnetic anisotropy. By the addition of Hf or W, it is made possible to obtain a perpendicular magnetic recording medium greatly exceeding the limit of perpendicular magnetic anisotropy in Co-Cr binary alloys, and the recording density characteristics can be greatly improved.

Inventors

• 👤 Mamoru Sugimoto
• 👤 守 杉本
• 👤 Satoshi Nehashi
• 👤 聡 根橋
• 👤 Akihiko Kawachi
• 👤 河内　明彦

Bibliographic Details