Magnetic recording head with spin torque oscillator having inverted current supply circuit
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United States of America Patent
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Apr 28, 2015
Grant Date -
May 1, 2014
app pub date -
Mar 14, 2013
filing date -
Oct 26, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, a magnetic recording head includes a main magnetic pole configured to apply a recording magnetic field to a recording layer of a recording medium, a spin torque oscillator adjacent to the main magnetic pole in a vicinity of a disk-facing surface confronting the recording medium, a recording coil configured to excite the main magnetic pole, a recording current control circuit configured to supply a recording current to the recording coil, a constant current supply circuit configured to supply a constant current to the spin torque oscillator, and an inverted current supply circuit configured to supply an inverted current having a polarity different from the constant current to the spin torque oscillator.
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