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Co-γFe_2O_3/NiO thin-film media for perpendicular and longitudinal magnetic recording

Journal of Magnetics Society of Japan Volume 23 Issue 5 Page 1739-1745
published_at 1999
Title
垂直および長手両記録方式に対応可能なCo含有酸化鉄薄膜メディア
Co-γFe_2O_3/NiO thin-film media for perpendicular and longitudinal magnetic recording
Creators Yamamoto Setsuo
Creators Kurisu Hiroki
Creators 松浦 満
Creators 土井 孝紀
Creators 田万里 耕作
Creator Keywords
Co-γFe_2O_3 NiO perpendicular recording longitudinal recording recording media thin-film media
A preparation method, magnetic and crystallographic properties, and recording characteristics of Co-γFe_2O_3/NiO thin-film media applicable to both perpendicular and longitudinal magnetic recording are discussed. The easy magnetization direction of the Co-γFe_2O_3 layer can be controlled by selecting an appropriate crystal orientation for the NiO underlayer. The media were prepared in a two-stage process: deposition of a CoO-Fe_3O_4/NiO layer by reactive sputtering in an Ar+O_2 mixture gas using Ni and CoFe alloy targets, and transformation of CoO-Fe_3O_4/Nio into Co-γFe_2O_3/NiO by plasma oxidization or annealing in air. The specific properties of Co-γFe_2O_3/NiO thin-film media are hardness and chemical stability, low-tem-perature (less than 300℃) fabrication, smooth surface, large magnetic anisotropy (K_u of 1-3X10^6erg/cm_3), widely changeable coercivity (0.7-8kOe), and excellent recording performance. The Co-γFe_2O_3/NiO medium is promising for achieving ultra-high-density recording.
Languages jpn
Resource Type journal article
Publishers 日本応用磁気学会
Date Issued 1999
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0285-0192
[NCID]AN0031390X
[isVersionOf] [URI]http://www.wdc-jp.com/msj/journal/index.html
Schools 大学院理工学研究科(工学)