Patent ID: 7679861

Claim:
A magnetic head for perpendicular magnetic recording comprising: a medium facing surface that faces toward a recording medium; a coil for generating a magnetic field corresponding to data to be written on the recording medium; and a pole layer allowing a magnetic flux corresponding to the field generated by the coil 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, wherein: the pole layer incorporates a track width defining portion and a wide portion that is located away from the medium facing surface and coupled to the track width defining portion; the track width defining portion has an end face that is located in the medium facing surface and that defines a track width; a maximum width of the wide portion is greater than the track width and equal to or greater than a length of the wide portion taken in a direction orthogonal to the medium facing surface; the pole layer is made of a magnetic material and does not include any nonmagnetic layer inside; and when the coil is generating no magnetic field, in the end face of the track width defining portion, there exist a first region and a second region in which directions of components of magnetization orthogonal to the medium facing surface are opposite.