Perpendicular magnetic recording medium, method for preparing the same and magnetic recording equipment

Abstract

The object of the present invention is to provide a perpendicular medium, which can suppress the dispersion of alignment and reduce the size of magnetic clusters in the magnetic recording layer by forming the isolation structure of the bottom layer by a simple method like the conventional process for producing continuous film medium. Perpendicular media also have a higher recording density due to the thinner underlying film. A perpendicular magnetic recording medium comprises at least one underlayer and a magnetic recording layer sequentially laminated on a non-magnetic substrate. The bottom layer is composed of crystal grains and amorphous grain boundaries, and the shape of the grains satisfies the following relationship: (area of ​​the bottom region at the initial stage of growth) > (area of ​​the top region).

Description

[0001] related application

[0002] This application is based on and claims priority from Japanese Application No. 2004-201115 filed on July 7, 2004, the contents of which are incorporated herein by reference. technical field

[0003] The present invention relates to a perpendicular magnetic recording medium mounted on various magnetic recording devices, a manufacturing method thereof, and a magnetic recording device using the perpendicular magnetic recording medium. technical background

[0004] As a technology capable of obtaining high-density magnetic recording, perpendicular magnetic recording systems are being regarded as possible substitutes for conventional longitudinal magnetic recording systems. In a perpendicular magnetic recording system, the direction of magnetization during recording is perpendicular to the plane of the medium, while in a longitudinal magnetic recording system, the direction of magnetization during recording is along the plane of the medium. Th...

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