Magnetic disk device and high-frequency assist recording method
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United States of America Patent
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Jan 16, 2018
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app pub date -
Sep 6, 2016
filing date -
Mar 10, 2016
priority date (Note) -
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Abstract
According to one embodiment, a magnetic disk device includes a magnetic recording medium, a head including a recording magnetic pole, a spin torque oscillator provided near the recording magnetic pole, and a coil which excites the recording magnetic pole, a first current supply which supplies the coil with a first current corresponding to write data, a detector which detects a first signal corresponding to the write data, and outputs a second signal in accordance with the first signal, and a second power supply which varies, in accordance with the second signal, a second current supplied to the spin torque oscillator.
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