title: Efficient Synchronization of Dipolarly Coupled Vortex-Based Spin Transfer Nano-Oscillators.
abstract: Due to their nonlinear properties, spin transfer nano-oscillators can easily adapt their frequency to external stimuli. This makes them interesting model systems to study the effects of synchronization and brings some opportunities to improve their microwave characteristics in view of their applications in information and communication technologies and/or to design innovative computing architectures. So far, mutual synchronization of spin transfer nano-oscillators through propagating spinwaves and exchange coupling in a common magnetic layer has been demonstrated. Here we show that the dipolar interaction is also an efficient mechanism to synchronize neighbouring oscillators. We experimentally study a pair of vortex-based spin transfer nano-oscillators, in which mutual synchronization can be achieved despite a significant frequency mismatch between oscillators. Importantly, the coupling efficiency is controlled by the magnetic configuration of the vortices, as confirmed by an analytical model and micromagnetic simulations highlighting the physics at play in the synchronization process.
authors.affiliation: Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, F91767 Palaiseau, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Locatelli
authors.affiliation: Service de Physique de l'Etat Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F91191 Gif-sur-Yvette, France.
authors.forename: Abbass
authors.initials: A
authors.lastname: Hamadeh
authors.affiliation: Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, BE-1348 Louvain-la-Neuve, Belgium.
authors.forename: Flavio
authors.initials: F
authors.lastname: Abreu Araujo
authors.affiliation: Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, 141700 Dolgoprudny, Russia.|A. M. Prokhorov General Physics Institute, RAS, Vavilova 38, Moscow, Russia.
authors.forename: Anatoly D
authors.initials: AD
authors.lastname: Belanovsky
authors.affiliation: Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, 141700 Dolgoprudny, Russia.|A. M. Prokhorov General Physics Institute, RAS, Vavilova 38, Moscow, Russia.
authors.forename: Petr N
authors.initials: PN
authors.lastname: Skirdkov
authors.affiliation: Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, F91767 Palaiseau, France.
authors.forename: Romain
authors.initials: R
authors.lastname: Lebrun
authors.affiliation: Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, F91767 Palaiseau, France.|Service de Physique de l'Etat Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F91191 Gif-sur-Yvette, France.|Institute of Physics, Kazan Federal University, Kazan 420008, Russian Federation.
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Naletov
authors.affiliation: Moscow Institute of Physics and Technology (State University), Institutskiy per. 9, 141700 Dolgoprudny, Russia.|A. M. Prokhorov General Physics Institute, RAS, Vavilova 38, Moscow, Russia.|Istituto P.M. srl, Via Grassi 4, Torino, Italy.
authors.forename: Konstantin A
authors.initials: KA
authors.lastname: Zvezdin
authors.affiliation: Instituto de Microelectrónica de Madrid-IMM (CNM-CSIC), Isaac Newton 8-PTM, 28760 Tres Cantos, Madrid, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Muñoz
authors.affiliation: Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, F91767 Palaiseau, France.
authors.forename: Julie
authors.initials: J
authors.lastname: Grollier
authors.affiliation: Service de Physique de l'Etat Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F91191 Gif-sur-Yvette, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Klein
authors.affiliation: Unité Mixte de Physique CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, F91767 Palaiseau, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Cros
authors.affiliation: Service de Physique de l'Etat Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F91191 Gif-sur-Yvette, France.
authors.forename: Grégoire
authors.initials: G
authors.lastname: de Loubens