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Proceedings Paper

Injection locking of single-vortex and double-vortex spin-torque oscillators
Author(s): Daniel E. Bürgler; Volker Sluka; Ronald Lehndorff; Alina M. Deac; Attila Kákay; Riccardo Hertel; Claus M. Schneider
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Paper 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.

Paper Details

Date Published: 15 September 2011
PDF: 9 pages
Proc. SPIE 8100, Spintronics IV, 810018 (15 September 2011); doi: 10.1117/12.892395
Show Author Affiliations
Daniel E. Bürgler, Forschungszentrum Juelich GmbH (Germany)
Volker Sluka, Forschungszentrum Juelich GmbH (Germany)
Ronald Lehndorff, Forschungszentrum Juelich GmbH (Germany)
Alina M. Deac, Forschungszentrum Juelich GmbH (Germany)
Attila Kákay, Forschungszentrum Juelich GmbH (Germany)
Riccardo Hertel, Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS, Univ. de Strasbourg (France)
Claus M. Schneider, Forschungszentrum Juelich GmbH (Germany)

Published in SPIE Proceedings Vol. 8100:
Spintronics IV
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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