Data storage device with phase lock spin-torque oscillation stabilization
First Claim
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1. 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.
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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.
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Citations
20 Claims
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1. A data writer apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A sensor apparatus comprising:
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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. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for making a data writer comprising:
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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. - View Dependent Claims (17, 18, 19, 20)
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Specification