Magnetic head and information storage device
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United States of America Patent
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N/A
Issued Date -
Mar 6, 2008
app pub date -
Jul 17, 2007
filing date -
Aug 31, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A magnetic head includes a magnetic pole placed opposite a surface of a recording medium and moving relatively to the surface in a direction along the surface, the magnetic pole generating a magnetic line of force that crosses the surface of the recording medium, and a coil that excites the magnetic pole. The magnetic pole has a number of layers stacked on one another in a direction along the movement relatively to the surface of the recording medium, and the layers include a most forward layer located at a most forward position of the movement and consisting of a first magnetic material and a most backward layer located at a most backward position of the movement and consisting of a second magnetic material having a saturation magnetic flux density higher than that of the first magnetic material and a coercive force larger than that of the first magnetic material.
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