Current drive type magnetic head and disk drive with the same

摘要

According to one embodiment, a magnetic head includes a magnetic core including a main pole, and a return pole opposed to the main pole with a magnetic gap therebetween, and configured to return magnetic flux from the main pole and form a magnetic circuit in conjunction with the main pole, a coil configured to excite magnetic flux in the magnetic circuit, and a nonmagnetic electrically conductive layer formed by disposing only a nonmagnetic material in the magnetic gap between the return pole and an end portion of the main pole on the recording medium side, and configured to electrically connect the main pole and the return pole. The main pole, the nonmagnetic electrically conductive layer, and the return pole are configured to constitute a series electrical circuit.

主权项

1. A magnetic head comprising:
a magnetic core comprising a main pole configured to apply a recording magnetic field perpendicular to a recording layer of a recording medium, and a return pole opposed to the main pole with a magnetic gap therebetween, the return pole configured to return magnetic flux from the main pole and form a magnetic circuit in conjunction with the main pole; a coil configured to generate, by a first current, the magnetic flux in the magnetic circuit; a nonmagnetic electrically conductive layer formed by disposing a nonmagnetic material in the magnetic gap between the return pole and an end portion of the main pole on a side of the recording medium, and configured to electrically connect the main pole and the return pole; and a wiring configured to supply a second current in series through the main pole, the nonmagnetic electrically conductive layer, and the return pole.