Perpendicular magnetic memory medium, a manufacturing method thereof, and a magnetic memory storage

Abstract

A perpendicular magnetic memory medium capable of high-density recording and reproducing consists of a soft magnetic lining layer (12), a non-magnetic middle layer (13), a recording layer (14) that is formed by arranging hard magnetic nanoparticles (17), an overcoat layer (15), and a lubricous layer (16), all of which are arranged on a substrate (11) in this sequence, wherein an average diameter of the nanoparticles ranges between 2 nm and 10 nm, a standard deviation of diameters of the nanoparticles is 10% or less of the average diameter of the nanoparticles, and an average interval of the nanoparticles is between 0.2 nm and 5 nm, and an magnetic easy axis of the recording layer 14 is perpendicular to a face of the substrate (11), such that high-density recording and reproducing is realized by the perpendicular magnetic medium.

Dependencies are inferred from the claim text.