Magnetic recording medium and a magnetic storage apparatus

Abstract

In a magnetic storage device, comprising a magnetic recording medium, a drive division that drives said magnetic recording medium in the record direction, a recording division and a regeneration division comprises magnetic head a means that the said magnetic head is put on in the relative motion for the said magnetic recording medium, a signal processing means for carrying out signal input to the said magnetic head and output signal regeneration from the said magnetic head, The said magnetic storage device uses a medium that has a following features; a magnetic layer in the said magnetic recording medium is formed on the substrate through monolayer or multiple underlayer, comprises said magnetic recording medium, the said magnetic layer has granular structure that the magnetic crystal grain is separated by the nonmagnetic phase, and the coercive force orientation ratio is bigger than 1. In the approximation that the said magnetic crystal grain is ellipsoid, the area ratio of the crystal grain of which the extended shaft direction is within 30° from circumferential direction is over 45% or c shaft length radialy measured swells over 1% compared to a shaft length circumferentially measured.

Dependencies are inferred from the claim text.