Journal of the Magnetics Society of Japan
Online ISSN : 1882-2932
Print ISSN : 1882-2924
長野 克政佐々木 翔太二本 正昭
ジャーナル オープンアクセス

34 巻 (2010) 3 号 p. 185-190

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  The stability of recorded magnetization on hard disk drives (HDDs) is influenced by external environments, such as temperature and magnetic fields. Small scratches are frequently formed on an HDD medium surface on contact with the magnetic head. The influence of a perpendicular magnetic field and mechanical scratching on the magnetization structural stability of perpendicular recording media was investigated by using a magnetic force microscope. The magnetization structure started to change at lower magnetic fields in an area near and below mechanical scratches when compared with normal areas with no scratches. A quantitative analysis of variations in the magnetization structure was carried out by taking into consideration the difference in MFM images observed for the same sample area before and after exposing the sample to different magnetic fields.

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