PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS

摘要

A perpendicular magnetic recording medium according to an embodiment includes a substrate and perpendicular magnetic recording layer. The perpendicular magnetic recording layer includes a recording portion and non-recording portion. The recording portion has patterns regularly arranged in the longitudinal direction, and includes magnetic layers containing Fe or Co and Pt as main components, and at least one additive component selected from Ti, Si, Al, and W. The non-recording portion includes oxide layers formed by oxidizing the side surfaces of the magnetic layers, and nonmagnetic layers formed between the oxide layers.

主权项

1. A perpendicular magnetic recording medium manufacturing method comprising:
forming a mask layer comprising projections having regularly arranged patterns on a surface of a perpendicular magnetic recording medium, the perpendicular magnetic recording medium comprising a substrate and a magnetic layer, the magnetic layer comprising (1) a main component of (i) platinum and (ii) iron or cobalt and (2) an additive component of titanium, silicon, aluminum, or tungsten; etching through the mask layer to form regularly arranged patterns in the magnetic layer; forming oxide layers by oxidizing side surfaces of the regularly arranged patterns in the magnetic layer, the oxide layers being made of a first material, the first material being an oxide of the at least one additive component; removing the mask layer; and performing planarization to form nonmagnetic layers between the oxide layers, the nonmagnetic layers being made of a second material different from the first material, the second material being carbon, titanium, SiO2, or TiO2.