Magnetic recording medium and servo signal recording device
AssigneeSony Group Corporation
InventorsJunichi TACHIBANA, Noboru SEKIGUCHI
Life of this patent
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Abstract
[Solving Means] A magnetic recording medium according to an embodiment of the present technology is a tape-shaped magnetic recording medium, including: a magnetic layer including a servo band, a servo signal being recorded on the servo band. An index expressed by Sq×Fact.(p−p)/F0(p−p) is 0.42 or more, Sq being a squareness ratio of the magnetic layer in a perpendicular direction, F0(p−p) being a peak-to-peak value of a first magnetic force gradient strength observed by a magnetic force microscope when a servo signal is saturation-recorded on the magnetic layer, Fact.(p−p) being a peak-to-peak value of a second magnetic force gradient strength for the servo signal recorded on the servo band observed by the magnetic force microscope.
Claims11
A tape-shaped magnetic recording medium, comprising:
- a magnetic layer including a servo band, a servo signal being recorded on the servo band, wherein
- an index expressed by Sq×Fact.(p−p)/F0(p−p) is 0.42 or more, Sq being a squareness ratio of the magnetic layer in a perpendicular direction, F0(p−p) being a peak-to-peak value of a first magnetic force gradient strength observed by a magnetic force microscope when a servo signal is saturation-recorded on the magnetic layer, Fact.(p−p) being a peak-to-peak value of a second magnetic force gradient strength for the servo signal recorded on the servo band observed by the magnetic force microscope.
A servo signal recording device that records a servo signal on a tape-shaped magnetic recording medium including a magnetic layer including a servo band, the device including a servo write head and an auxiliary magnetic pole, comprising:
- a servo write head that records a servo signal on the servo band;
- and
- an auxiliary magnetic pole that is disposed to face the servo write head with the magnetic layer interposed therebetween, and is formed of a soft magnetic material.
Dependencies are inferred from the claim text.