Patent ID: 8363346
Filing Date: 2013-01-29
Classification: G11B

Abstract:
1. A magnetic head configured to record data in a recording medium which comprises an underlayer with soft magnetic characteristics and a recording layer with a magnetic anisotropy perpendicular to a surface of the medium formed on the underlayer, comprising: a first magnetic core comprising a main pole, which comprises an end portion opposed to the recording medium and is configured to produce a recording magnetic field, and a return pole, a part of which is opposed to a trailing side of the main pole to define a write gap therebetween, and configured to form a magnetic circuit in conjunction with the main pole; a first coil configured to generate magnetic flux in the magnetic circuit comprising the main pole and the return pole; side shields arranged respectively on opposite sides of the main pole so as to be magnetically separated from the main pole and formed integrally with the return pole; a second magnetic core configured to form a physically closed magnetic path, a part of which comprises the return pole; and a second coil wound around the second magnetic core and configured to generate magnetic flux in the closed magnetic path comprising the second magnetic core.