Magnetic recording medium and magnetic recording/reproducing apparatus

Abstract

The invention provides a magnetic recording medium and a magnetic recording reproducer provided with the magnetic recording medium; the magnetic recording medium is a vertical recording type with a soft magnetic layer, restrains the expansion of a recording magnetic field which is exerted on a magnetic track of a recorded object in good efficiency. The magnetic recording medium (12) is a discrete magnetic track type disk of the vertical recording type; the soft magnetic layer (24) and a recording layer (28) are formed on a substrate (22) in turn; the part of the soft magnetic layer (24) in the opposite side of the substrate (22) has concavo-convex patterns; the recording layer (28) is aligned in a mode that the direction vertical to the surface is provided with magnetic anisotropy and is divided into a plurality of recording elements (28A) through the concavo-convex patterns; a first fixed layer (26) is arranged between the recording layer (28) and the soft magnetic layer (24) and used for fixing the magnetic anisotropy of the soft magnetic layer (24) on the prescribed direction parallel to the surface.

Description

technical field [0001] The present invention relates to a perpendicular recording type magnetic recording medium and a magnetic recording and reproducing device having a soft magnetic layer. Background technique [0002] In the past, in magnetic recording media such as hard disks, the areal recording density has been significantly improved through fine processing of magnetic particles constituting the recording layer, changes in materials, and miniaturization of magnetic head processing. In addition, the following perpendicular recording type magnetic recording medium is also put into practical use. In this magnetic recording medium, the recording layer is oriented so as to have magnetic anisotropy in the direction perpendicular to the surface, and a soft magnetic layer is formed under the recording layer. , thereby increasing the areal recording density. [0003] In a perpendicular recording type magnetic recording medium, the soft magnetic layer has the effect of introduc...

AI Technical Summary

Problems solved by technology

[0005] For such magnetic recording media, the areal recording density is gradually increasing, and it is expected to further increase the areal recording density in the future. However, the processing limit of the magnetic head and the expansion of the recording magnetic field of the magnetic head cause crosstalk during recording and reproduction to adjacent tracks, etc. The problem of this problem has become prominent, and there is a limit to the improvement of the areal recording density of the conventional improvement method. Therefore, as a candidate for a magnetic recording medium that can further increase the areal recording density, a discrete track in which the recording layer is formed by a predetermined concave-convex pattern has been proposed. Magnetic recording media such as media and patterned media (for example, JP Unexamined Patent Publication No. 7-129953)

Images