Spin-torque oscillators (STOs) are a promising application for the spin-transfer torque effect. The major challenge lies in pushing the STO's microwave output power to useful levels, e.g., by operating an array of STOs in a synchronized, phase-locked mode. Our experiment on metallic, giant magnetoresistance-type nanopillars focuses on the influence of external high-frequency signals on the current-driven vortex dynamics and demonstrates the injection locking of the gyrotropic mode. We find a gap of about three orders of magnitude between the high-frequency power emitted by one oscillator and the power needed for phase-locking. © 2010 American Institute of Physics.
CITATION STYLE
Lehndorff, R., Bürgler, D. E., Schneider, C. M., & Celinski, Z. (2010). Injection locking of the gyrotropic vortex motion in a nanopillar. Applied Physics Letters, 97(14). https://doi.org/10.1063/1.3498009
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