1. Nanocontact based spin torque oscillators with two free layers
- Author
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Thibaut Devolder, W. Van Roy, Sébastien Petit-Watelot, J-V Kim, Mauricio Manfrini, R. Soucaille, L. Lagae, Centre de Nanosciences et Nanotechnologies (C2N (UMR_9001)), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), IMEC (IMEC), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), IMPACT N4S, ANR-15-IDEX-0004,LUE,Isite LUE(2015), and Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Physics ,Similarity (geometry) ,Acoustics and Ultrasonics ,Field (physics) ,Condensed matter physics ,Dynamics (mechanics) ,Spin valve ,Spin torque oscillators ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Vortex ,Extinction (optical mineralogy) ,[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] ,0103 physical sciences ,010306 general physics ,0210 nano-technology ,ComputingMilieux_MISCELLANEOUS ,Voltage - Abstract
We study a spin torque oscillator based on magnetic vortices hosted by a pseudo spin valve, and generated and confined by a nanocontact configuration. In addition to the standard functioning modes of such spin torque oscillators, we present evidence for field and current conditions leading to a novel extinction regime, where the oscillator response is transiently quenched. We model the dynamics analytically for two non-interacting vortices, one in each magnetic layer. The similarity of their trajectories makes them prone to interact. We argue that they can synchronize and then follow identical orbits, which leads to the extinction of the RF voltage emission.
- Published
- 2017