Pre-assisting microwave magnetic recording based on spin-hall nano-oscillators
AssigneeHeadway Technologies, Inc.
InventorsHaowen Ren, Shehrin Sayed, Wenyu Chen, Yuhui Tang
Life of this patent
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Abstract
The present embodiments relate to a pre-assisted microwave assisted magnetic recording (PA-MAMR) write head that utilizes spin-Hall nano-oscillators (SHNOs). The SHNO can include a free layer and a spin-hall layer comprising a spin-hall material(s). The SHNO(s) can be disposed in a leading shield (LS) region and can be used to pump energy into the media before the writing process. A spin-torque oscillator (STO) utilized in other write head designs can be replaced with SHNOs, which can pre-excite the media and let the media oscillation damp over time and then switch under the writer field.
Claims20
A pre-assist microwave-assisted magnetic recording (PA-MAMR) write head comprising:
- a magnetic main pole (MP) comprising a tip portion;
- a hot seed (HS) and a write gap (WG) disposed adjacent to the MP and configured to collect a magnetic flux from the MP;
- a magnetic leading-edge taper (LET) disposed on a first side of the tip portion of the MP and creating a taper in the first side of the tip portion of the MP;
- and
- a spin-hall nano oscillator (SHNO) disposed adjacent to a leading shield (LS) and the LET, wherein the SHNO comprises a free layer and a spin-hall layer.
A head arm assembly comprising:
- a recording head including a slider and a device connected to the slider, the device including:
- a main pole (MP);
- a magnetic leading-edge taper (LET) disposed on a first side of a tip portion of the MP and configured to create a taper in the first side of the MP;
- and
- a spin-hall nano oscillator (SHNO) disposed adjacent to a leading shield (LS) and the LET, wherein the SHNO comprises a free layer and a spin-hall layer;
- a load beam connected to the recording head;
- and
- a suspension connected to the load beam and configured to support the recording head.
A method for manufacturing a write head, the method comprising:
- disposing a hot seed (HS) and a write gap (WG) disposed adjacent to a main pole (MP), wherein the HS and the WG are configured to collect a magnetic flux from the MP;
- disposing a magnetic side shield (SS) adjacent to the HS, the SS configured to confine the magnetic flux in a cross-track direction;
- disposing a magnetic leading-edge taper (LET) on a first side of a tip portion of the MP, wherein the LET creates a taper in the first side of the MP;
- and
- disposing a spin-hall nano oscillator (SHNO) adjacent to a leading shield (LS) and the LET, wherein the SHNO comprises a free layer and a spin-hall layer.
Dependencies are inferred from the claim text.