MAMR head with a multi-layered side gap for stable oscillation of the STO

摘要

A microwave-assisted magnetic recording (MAMR) head according to one embodiment includes a main pole; a trailing shield positioned downstream from the main pole; an oscillation device adapted to generate a high-frequency magnetic field, the oscillation device being positioned between the main pole and the trailing shield; a circuit adapted to flow an electric current therethrough to the main pole, the oscillation device, and the trailing shield; an electrically conductive non-magnetic body positioned on one or more sides of the main pole in a cross-track direction and/or a leading direction; and an insulating non-magnetic body positioned on one or more sides of the electrically conductive non-magnetic body in the cross-track direction and/or the leading direction, wherein one or more edge portions of one side of the oscillation device and one or more edge portions of one side of the main pole are in direct contact with the electrically conductive non-magnetic body.

主权项

1. A microwave-assisted magnetic recording (MAMR) head, comprising:
a main pole comprising a magnetic body configured to generate a magnetic field for recording data on a magnetic recording medium; a trailing shield positioned downstream from the main pole in a direction in which the magnetic recording medium advances; two oscillation devices, each oscillation device being configured to generate a high-frequency magnetic field, the oscillation devices being positioned between the main pole and the trailing shield; a circuit configured to flow an electric current therethrough to the main pole, the oscillation devices, and the trailing shield; an electrically conductive non-magnetic body positioned on one or more sides of the main pole in a cross-track direction and/or a leading direction; and an insulating non-magnetic body positioned on one or more sides of the electrically conductive non-magnetic body in the cross-track direction and/or the leading direction, wherein one or more edge portions of one side of each of the oscillation devices and one or more edge portions of one side of the main pole are in direct contact with the electrically conductive non-magnetic body, and wherein all edge portions of the one side of each of the oscillation devices are in direct contact with one of: the main pole and the electrically conductive non-magnetic body.