Patent ID: 8498077

Claim:
A magnetic head for perpendicular magnetic recording, comprising: a medium facing surface that faces a recording medium; first, second, and third coils that produce magnetic fields corresponding to data to be written on the recording medium; a main pole having an end face located in the medium facing surface, the main pole allowing magnetic fluxes that correspond to the magnetic fields produced by the first, second, and third coils to pass, and producing a write magnetic field for writing the data on the recording medium by means of a perpendicular magnetic recording system; a write shield made of a magnetic material and having an end face located in the medium facing surface; a gap part made of a nonmagnetic material and interposed between the main pole and the write shield; a first yoke layer made of a magnetic material, magnetically connected to the write shield and located on a rear side in a direction of travel of the recording medium relative to the main pole; a second yoke layer made of a magnetic material, magnetically connected to the write shield and located on a front side in the direction of travel of the recording medium relative to the main pole; a first coupling part located away from the medium facing surface and magnetically coupling the main pole and the second yoke layer to each other; and a second coupling part located away from the medium facing surface and magnetically coupling the first yoke layer and the second yoke layer to each other without touching the main pole, wherein: the end face of the write shield includes a first end face portion located on the front side in the direction of travel of the recording medium relative to the end face of the main pole; the first coil is wound around the first coupling part, and includes a portion that passes between the first coupling part and the second coupling part; and the second and third coils are located at positions that are different from each other in the direction of travel of the recording medium, and are wound around the second coupling part.