Magnetic disk device and high-frequency assist recording method
AssigneeKabushiki Kaisha Toshiba
InventorTomomi Funayama
Life of this patent
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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.
Claims13
A magnetic disk device comprising:
- a head comprising 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, wherein
- the second power supply varies the second current by applying a third current thereto.
A high-frequency assist recording method for a magnetic disk device comprising:
- a head comprising 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 and a second power supply, the method comprising:
- detecting a first signal indicating the write data, and outputting a second signal in accordance with the first signal;
- varying, in accordance with the second signal, a second current supplied to the spin torque oscillator;
- and
- varying the second current by applying a third current thereto.
Dependencies are inferred from the claim text.