Data storage device with phase lock spin-torque oscillation stabilization

摘要

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.

主权项

1. An apparatus comprising:
a first spin-torque oscillator (STO) disposed between a write pole and a shield on an air bearing surface (ABS), the first STO having a first sidewall oriented at a non-zero angle with respect to an axis extending perpendicular to the ABS; and a second STO disposed between the write pole and shield, the second STO having a second sidewall oriented at a non-zero angle with respect to the axis extending perpendicular to the ABS, 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.