Patent ID: 8643972

Claim:
A method of determining parameters for controlling a magnetic storage apparatus provided with a magnetic recording medium, a microwave assisted magnetic recording head at least equipped with a magnetic recording pole that generates a recording magnetic field for writing to the magnetic recording medium and a high-frequency oscillator that generates a high-frequency field, a magnetic reproducing head that reads information from the magnetic recording medium, a unit that controls and processes the recording operation of the magnetic recording head and the reproducing operation of the magnetic reproducing head and a clearance control unit that controls clearance between the high-frequency oscillator and the magnetic recording medium in a manufacturing process of the magnetic storage apparatus, comprising first, second and third steps of: determining a combination of first and second current values in which a high recording/reproducing characteristic is acquired by varying the combination of the value of first current for generating the magnetic recording field and the value of second current for generating the high-frequency field and recording/reproducing in/from the magnetic recording medium; determining the combination of the first and second current values in which the high recording/reproducing characteristic is acquired by varying the first and second current values determined in the first step while varying the clearance until the clearance is a predetermined value by the clearance control unit as well as by recording/reproducing in/from the magnetic recording medium; and determining a combination of a current waveform and the timing of supply in which the high recording/reproducing characteristic is acquired by varying the waveform of the second current and the timing of the supply in recording/reproducing in/from the magnetic recording medium at the first and second current values determined in the second step.