Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive
First Claim
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1. A microwave assisted magnetic recording head comprising:
- a recording magnetic pole unit configured to produce a recording field for writing to a perpendicular magnetic recording medium; and
a high-frequency magnetic field oscillator configured to produce a high-frequency magnetic field,wherein;
the recording magnetic pole unit includes a longitudinal recording magnetic core with a write gap in which a longitudinal magnetic recording field component is produced as a main magnetic recording field component substantially perpendicular to a surface of the magnetic recording medium;
the magnetic core is configured such that an oscillation control magnetic field is applied in the write gap substantially perpendicular to the high-frequency magnetic field oscillator and substantially parallel to the surface of the magnetic recording medium; and
the high-frequency magnetic field oscillator is disposed in the write gap.
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Abstract
A microwave assisted magnetic recording head includes a recording magnetic pole unit that produces a recording field for writing to a perpendicular magnetic recording medium, and a high-frequency magnetic field oscillator that produces a high-frequency magnetic field. The recording magnetic pole unit includes a magnetic core with a write gap portion at which a main recording field component is concentrated, and the high-frequency magnetic field oscillator is disposed in the write gap.
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Citations
18 Claims
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1. A microwave assisted magnetic recording head comprising:
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a recording magnetic pole unit configured to produce a recording field for writing to a perpendicular magnetic recording medium; and a high-frequency magnetic field oscillator configured to produce a high-frequency magnetic field, wherein; the recording magnetic pole unit includes a longitudinal recording magnetic core with a write gap in which a longitudinal magnetic recording field component is produced as a main magnetic recording field component substantially perpendicular to a surface of the magnetic recording medium; the magnetic core is configured such that an oscillation control magnetic field is applied in the write gap substantially perpendicular to the high-frequency magnetic field oscillator and substantially parallel to the surface of the magnetic recording medium; and the high-frequency magnetic field oscillator is disposed in the write gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A magnetic recording apparatus comprising:
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a microwave assisted magnetic recording head including a recording magnetic pole including a longitudinal recording magnetic core with a write gap in which a longitudinal magnetic recording field component is produced as a main magnetic recording field component substantially perpendicular to a surface of the magnetic recording medium, the magnetic core is configured such that an oscillation control magnetic field is applied in the write gap substantially perpendicular to the high-frequency magnetic field oscillator and substantially parallel to the surface of the magnetic recording medium, a high-frequency magnetic field oscillator disposed in the write gap, a magnetic reproduction element configured to read information from a perpendicular magnetic recording medium, and a thermal flying height controller (TFC) element configured to adjust a clearance between the high-frequency magnetic field oscillator and the perpendicular magnetic recording medium; a unit configured to control or process a recording operation by the recording magnetic pole and the high-frequency magnetic field oscillator, and a reproduction operation by the magnetic reproduction element; and a TFC control unit configured to control an operation of the TFC element. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A recording/reproducing head drive control apparatus comprising:
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a recording signal supply unit configured to supply a recording signal to a recording magnetic pole; a drive control unit configured to supply a drive signal to a high-frequency magnetic field oscillator; and a unit configured to supply a preliminary operation current to a ring-type magnetic core in accordance with a direct instruction from a microprocessor (MPU), and configured to cause the recording signal and the high-frequency oscillator drive signal to be supplied a predetermined time later as needed in accordance with the timing of a write gate outputted from a disk controller (HDC); wherein the recording magnetic pole includes a longitudinal recording magnetic core with a write gap in which a longitudinal magnetic recording field component is produced as a main magnetic recording field component substantially perpendicular to a surface of the magnetic recording medium; and wherein the magnetic core is configured such that an oscillation control magnetic field is applied in the write gap substantially perpendicular to the high-frequency magnetic field oscillator and substantially parallel to the surface of the magnetic recording medium. - View Dependent Claims (18)
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Specification