Patent ID: 8094399
Filing Date: 2012-01-10
Classification: G11B

Abstract:
1. A magnetic recording apparatus comprising: a magnetic recording medium having a magnetic recording layer; a thin-film magnetic head with a microwave-band magnetic drive function, the head having write field generation means that generates a write field to the magnetic recording medium in response to a write signal, and a microwave generator that is provided independent of the write field generation means and generates an alternating magnetic field in plane having a microwave-band frequency when microwave-excitation current is fed; excitation current generation means that generates the microwave-excitation current by amplitude-modulating microwave carrier current with a modulating signal having a fixed period, said excitation current generation means including at least a microwave oscillator, a modulating signal generator and an amplitude modulator; and write signal supply means that generates the write signal and applies the write signal to the write field generation means of the thin-film magnetic head.