Patent ID: 7944780

Claim:
A magnetic recording device including: a disk driving device for rotating a magnetic disk; a head provided with a heating section for heating a circular track of the magnetic disk, and a recording element for applying a magnetic field modulated by electric signals to the magnetic disk; and a head drive device for moving the head along an arc in a radial direction of the magnetic disk by rotating about a drive shaft; wherein, in any of tracks to be recorded in the magnetic disk, the recording element contains a magnetic applying section of a length G configured to apply magnetism to the track heated by the heating section, wherein the length G of the magnetic applying section satisfies a Formula (A), when: “d 1 ” denotes a distance between a point wherein a line segment connecting between a center of the heating section and a rotating center of the drive shaft crosses the magnetic applying section, and the center of the heating section; “θ 1 ” indicates an angle formed by a line segment L 1 connecting between the center of the heating section and the rotating center of the drive shaft in an outermost peripheral track, and the tangential S 1 of the outermost peripheral track heated by the heating section; and “θ 2 ” represents an angle formed by a line segment L 3 connecting between the center of the heating section and the rotating center of the drive shaft in the track of the innermost periphery, and the tangential S 3 of the innermost periphery of the track heated by the heating section, G>d 1×tan|θ1 |+d 1×tan|θ2| (A).