Data storage device with phase lock spin-torque oscillation stabilization
AssigneeSeagate Technology LLC
InventorKaizhong Gao
Life of this patent
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Abstract
A data storage device can be configured at least with a first spin-torque oscillator disposed between and contacting a write pole and a shield on an air bearing surface. A second spin-torque oscillator can be disposed between and contact the write pole and shield with the second spin-torque oscillator separated from the air bearing surface by a first stabilization distance and from the first spin-torque oscillator by a second stabilization distance. The first and second spin-torque oscillators can be configured to magnetostatically couple and phase lock to produce a single microwave frequency in response to a bias field.
Claims20
A data writer apparatus comprising:
- a first spin-torque oscillator (STO) disposed between and contacting a write pole and a shield on an air bearing surface (ABS);
- and
- a second STO disposed between and contacting the write pole and shield, the second STO separated from the ABS by a first stabilization distance and from the first STO by a second stabilization distance, the first and second STOs configured to magnetostatically couple and phase lock to produce a single microwave frequency in response to a bias field.
A sensor apparatus comprising:
- a first spin-torque oscillator (STO) disposed between and contacting a write pole and a shield on an air bearing surface (ABS);
- and
- a second STO disposed between and contacting the write pole and shield, the second STO separated from the ABS by a first stabilization distance and from the first STO by a second stabilization distance, each STO comprising an interlayer separating an injector layer from a generating layer, the first STO configured differently than the second STO to magnetostatically couple and phase lock the first and second STOs to produce a single microwave frequency in response to a bias field.
A method for making a data writer comprising:
- positioning a first spin-torque oscillator (STO) between and contacting a write pole and a shield on an air bearing surface (ABS);
- disposing a second STO between and contacting the write pole and shield, the second STO separated from the ABS by a first stabilization distance and from the first STO by a second stabilization distance;
- and
- passing a bias field through each STO to magnetostatically couple and phase lock the first and second STOs to generate a single microwave frequency.
Dependencies are inferred from the claim text.