Patent ID: 7940495

Claim:
A magnetic head for perpendicular magnetic recording comprising: a medium facing surface that faces toward a recording medium; a first coil and a second coil each generating a magnetic field corresponding to data to be written on the recording medium; a magnetic layer for writing having an end face located in the medium facing surface, allowing a magnetic flux corresponding to the field generated by each of the first and second coils to pass therethrough, and generating a write magnetic field for writing the data on the recording medium by means of a perpendicular magnetic recording system; a first magnetic layer for flux concentration disposed backward of the magnetic layer for writing along a direction of travel of the recording medium, connected to the magnetic layer for writing at a location away from the medium facing surface, and allowing a magnetic flux corresponding to the field generated by the first coil to pass; and a second magnetic layer for flux concentration disposed forward of the magnetic layer for writing along the direction of travel of the recording medium, connected to the magnetic layer for writing at a location away from the medium facing surface, and allowing a magnetic flux corresponding to the field generated by the second coil to pass, wherein: when seen in a direction orthogonal to an interface between the first magnetic layer for flux concentration and the magnetic layer for writing, the first coil is wound around the interface between the first magnetic layer for flux concentration and the magnetic layer for writing; when seen in a direction orthogonal to an interface between the second magnetic layer for flux concentration and the magnetic layer for writing, the second coil is wound around the interface between the second magnetic layer for flux concentration and the magnetic layer for writing; and when seen in the direction orthogonal to the interface between the second magnetic layer for flux concentration and the magnetic layer for writing, the interface between the second magnetic layer for flux concentration and the magnetic layer for writing is disposed at a location different from that of the interface between the first magnetic layer for flux concentration and the magnetic layer for writing in a direction parallel to the interface between the second magnetic layer for flux concentration and the magnetic layer for writing.