Magnetic disk apparatus
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United States of America Patent
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Feb 10, 2015
Issued Date -
N/A
app pub date -
Sep 10, 2014
filing date -
Jun 30, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, a magnetic disk apparatus includes a main magnetic pole configured to apply a recording magnetic field to a recording medium, a recording coil configured to magnetize the main magnetic pole, a spin-torque oscillator adjacent to the main magnetic pole, and configured to generate a high frequency magnetic field, a recording current control circuit configured to supply a recording current to the recording coil, a driving current control circuit configured to supply a fixed driving current to the spin-torque oscillator, and an overshoot control circuit configured to control overshoot current of the recording current in proportion to the magnitude of the driving current after the recording current has reversed.
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