Patent ID: 8717705
Filing Date: 2014-05-06
Classification: G11B

Abstract:
1. A magnetic recording head comprising: a facing surface configured to face a recording medium; a main magnetic pole including an extreme end exposed to the facing surface and configured to apply a recording magnetic field to a recording layer of the recording medium; and a high-frequency oscillator disposed near to a trailing side of the main magnetic pole and configured to apply a high-frequency magnetic field to the recording layer; wherein an angle defined between a recording magnetic field applied from the main magnetic pole to the recording medium and the facing surface is 0 to 85° in a region between a trailing side end of the main magnetic pole and a trailing side end of the high-frequency oscillator, and when a reversal magnetic field, at the time the high-frequency oscillator does not oscillate a high-frequency magnetic field, is shown by HcO, a oscillation frequency f (GHz) of the high-frequency oscillator is: