Apparatus for assisting write operation using high frequency magnetic field in disk drive
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United States of America Patent
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Sep 7, 2010
Grant Date -
Mar 5, 2009
app pub date -
Aug 22, 2008
filing date -
Sep 5, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to one embodiment, a disk drive having a spin torque oscillator and designed to perform high frequency assisted writing. The disk drive has a magnetic disk, a magnetic head, a coil, and a drive current controller. The drive current controller controls a drive current to supply to the spin torque oscillator. To record data magnetically in the disk, the drive current controller supplies to the spin torque oscillator the drive current that changes in synchronism with the polarity inversion of the recording current supplied to the coil, which excites the recording magnetic pole of the magnetic head.
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