Vertical magnetic recording medium

Abstract

Abstract PURPOSE:To obtain a thin film medium for vertical magnetic recording having a high output-noise ratio even when recording is carried out at about 150kBPI high density, by alternately laminating thin films having vertical magnetic anisotropy and nonmagnetic layers. CONSTITUTION:Thin films 12, 12' of a magnetic alloy having high magnetic permeability such as Co-Zr-Mo or Ni-Fe, nonmagnetic layers 13, 13' of Cr, Ti, Al2O3 or the like, thin films 14, 14' of Co, Co-Cr or the like having vertical magnetic anisotropy, nonmagnetic layers 15, 15' of Cr, Ti, Al2O3, CrO or the like, and thin films 16, 16' of Co, Co-Cr-Rh, Co-Cr-Mo or the like having vertical magnetic anisotropy are successively formed on a substrate 11 of glass or the like. Since the thin films 14, 14', 16, 16' having vertical magnetic anisotropy and the nonmagnetic intermediate layers 13, 13', 15, 15' are alternately laminated, high density and a considerably high output-noise ratio are provided.

Inventors

• 👤 Yoshihiro Shiroishi
• 👤 芳博 城石
• 👤 Kazuo Shiiki
• 👤 椎木　一夫
• 👤 Yasutaro Kamisaka
• 👤 保太郎 上坂
• 👤 Sadao Hishiyama
• 👤 菱山　定夫
• 👤 Kiminari Shinagawa
• 👤 品川　公成

Bibliographic Details