Magnetic recording head, magnetic head assembly, magnetic recording apparatus, and magnetic recording method

摘要

An example magnetic recording apparatus includes a magnetic recording medium, a magnetic recording head and a signal processor. The magnetic recording head includes a first magnetic pole; a second magnetic pole; a spin torque oscillator; a first coil to magnetize the first magnetic pole; and a second coil through which a current is passed independently of the first coil. The signal processor writes and reads a signal on the magnetic recording medium by using the magnetic recording head and includes a first current circuit to supply a recording current to the first coil and a second current circuit to supply a modulating current to the second coil.

主权项

1. A magnetic recording apparatus, comprising:
a magnetic recording medium; a magnetic recording head including:
a first magnetic pole to apply a recording magnetic field to the magnetic recording medium;a second magnetic pole provided parallel to the first magnetic pole;a spin torque oscillator at least a portion of which is provided between the first magnetic pole and the second magnetic pole;a first coil to magnetize the first magnetic pole; anda second coil through which a current is passed independently of the first coil; and a signal processor to write and read a signal on the magnetic recording medium by using the magnetic recording head, the signal processor including:
a first current circuit to supply a recording current to the first coil, the recording current including a recording signal to be recorded on the magnetic recording medium; anda second current circuit to supply a modulating current to the second coil, wherein the modulating current includes either one of a signal changing at a frequency higher than that of the recording signal and a signal having the same frequency as the recording signal and changing an absolute value thereof in one cycle.