Patent ID: 8611034

Claim:
A magnetic recording device, comprising: a magnetic disk; a magnetic head that performs magnetic recording to the magnetic disk, including: main magnetic pole layer that generates a recording magnetic field synchronizing a recording current generated by recording voltage corresponding to recording signals and that applies the recording magnetic field to the magnetic disk; and a microwave generating element that is arranged in a vicinity of the main magnetic pole layer and that applies a microwave magnetic field to the magnetic disk during magnetic recording; and a microwave generating element driving current control circuit that, during the magnetic recording, applies a microwave generating element driving current at a first current level to the microwave generating element for a period that is from at the latest a polarity reversal of the recording current before a subsequent polarity reversal of the recording voltage, and thereafter that applies another microwave generating element driving current at a second current level, which is smaller than the first current level, to the microwave generating element, until the polarity reversal of the recording voltage.