Magnetic recording head, magnetic head assembly, magnetic recording apparatus, and magnetic recording method
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United States of America Patent
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Jun 28, 2016
Grant Date -
Oct 29, 2015
app pub date -
Jul 6, 2015
filing date -
Nov 28, 2008
priority date (Note) -
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Abstract
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 to apply a recording magnetic field to the magnetic recording medium; a spin torque oscillator arranged parallel to the first magnetic pole; and a first coil to magnetize the first magnetic pole. 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, the recording current including a recording signal to be recorded on the magnetic recording medium. The recording 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.
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