Microwave-assisted magnetic recording head
AssigneeHGST Netherlands B.V.
InventorsJunichiro Shimizu, Masukaza Igarashi
Life of this patent
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Abstract
Embodiments of the present invention generally relate to a MAMR head. The MAMR head includes an STO. The STO has a first surface at a media facing surface, a second surface that is opposite the first surface and a third surface adjacent to the first and second surfaces. The first and third surfaces form a first acute angle and the second and third surfaces form a second acute angle, where the second acute angle is less than or equal to the first acute angle. Having this configuration, the electrical current going through the STO is substantially perpendicular to the STO, which causes the spin torque to be maximized.
Claims20
A microwave assisted magnetic recording head, comprising:
- a spin torque oscillator, wherein the spin torque oscillator includes:
- a first surface at a media facing surface;
- a second surface opposite the first surface;
- and
- a third surface adjacent to the first and second surfaces, wherein the third surface and the first surface form a first acute angle and the third surface and the second surface form a second acute angle, and wherein the second acute angle is less than or equal to the first acute angle.
A microwave assisted magnetic recording head, comprising:
- a spin torque oscillator, wherein the spin torque oscillator includes:
- a reference layer having a first surface at a media facing surface, a second surface opposite the first surface, and a third surface adjacent to the first and second surfaces, wherein the first surface and the third surface forms a first angle;
- an interlayer having a fourth surface at the media facing surface and a fifth surface opposite the fourth surface;
- and
- a field generation layer disposed adjacent to the interlayer, wherein
- the field generation layer has a sixth surface disposed at the media facing surface and a seventh surface opposite the fifth surface, wherein the second, fifth and seventh surfaces together have a curvature.
A hard disk drive, comprising:
- a magnetic media;
- a magnetic read head;
- and
- a magnetic write head, wherein the magnetic read head and the magnetic write head include a media facing surface, and the magnetic write head further includes a spin torque oscillator, wherein the spin torque oscillator has:
- a first surface at the media facing surface;
- a second surface opposite the first surface;
- and
- a third surface adjacent to the first and second surfaces, wherein the third surface and the first surface form a first acute angle and the third surface and the second surface form a second acute angle, and wherein the second acute angle is less than or equal to the first acute angle.
Dependencies are inferred from the claim text.