Injection locking of single-vortex and double-vortex spin-torque oscillators

Daniel E. Bürgler; Volker Sluka; Ronald Lehndorff; Alina M. Deac; Attila Kákay; Riccardo Hertel; Claus M. Schneider

doi:10.1117/12.892395

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15 September 2011 Injection locking of single-vortex and double-vortex spin-torque oscillators

Daniel E. Bürgler; Volker Sluka; Ronald Lehndorff; Alina M. Deac; Attila Kákay; Riccardo Hertel; Claus M. Schneider

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Proceedings Volume 8100, Spintronics IV; 810018 (2011) https://doi.org/10.1117/12.892395
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

Spin-torque oscillators are a promising application for the spin-transfer torque effect. The major challenge lies in pushing their microwave output power to useful levels, e.g. by operating an array of spin-torque oscillators in a synchronized, phase-locked mode. Our experiments on metallic, GMR-type nanopillars focus on the influence of external high-frequency signals on the current-driven vortex dynamics in single-vortex and double-vortex spintorque oscillators. For both cases we observe injection locking behavior according to the nonlinear oscillator theory, which is a prerequisite for the synchronization of spin-torque oscillators via microwaves in common electrical electrodes.

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Daniel E. Bürgler, Volker Sluka, Ronald Lehndorff, Alina M. Deac, Attila Kákay, Riccardo Hertel, and Claus M. Schneider "Injection locking of single-vortex and double-vortex spin-torque oscillators", Proc. SPIE 8100, Spintronics IV, 810018 (15 September 2011); https://doi.org/10.1117/12.892395

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