| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium with small noises caused by the medium generated when reproducing a record and suitable for high recording density. SOLUTION: In the perpendicular magnetic recording medium comprising of at least a soft magnetic backing layer, an intermediate layer, a magnetic recording layer, a protection layer, and a liquid lubricant layer sequentially laminated on a non magnetic substrate, the above magnetic recording layer is comprised of rare-earth transition alloyed metal amorphous films, the rare- earth transition alloyed metal amorphous film has a fine column structure, boundary parts exist around these columns, the composition of the boundary parts are the vicinity of composition of compensation points of the rare-earth transition alloyed metal amorphous films, and the composition in the above columns is lower than the composition of above boundary part in terms of the density of rare-earth elements and higher than the composition of above boundary parts in terms of the density of the transition metal elements, in performing perpendicular magnetic recording, the magnetization is fixed as the above boundary part is a compensation point composition, and the above boundary part function as a magnetic wall fixing part of a recording signal.
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