Robust synchronization of an arbitrary number of spin-torque driven vortex nanooscillators

Abstract

Non-linear magnetization dynamics in ferromagnetic nanoelements excited by the spin-polarized dc-current is one of the most intensively studied phenomena in solid state magnetism. Despite immense efforts, synchronization of oscillations induced in several such nanoelements (spin-torque driven nanooscillators, or STNO) still represents a major challenge both from the fundamental and technological points of view. In this paper we propose a system where synchronization of any number of STNOs, represented by magnetization vortices inside squared nanoelements, can be easily achieved. Using full-scale micromagnetic simulations we show that synchronization of these STNOs is extremely dynamically stable due to their very large coupling energy provided by the magnetodipolar interaction. Finally, we demonstrate that our concept allows robust synchronization of an arbitrary number of STNOs (arranged either as a 1D chain or as a 2D array), even when current supplying nanocontacts have a broad size distribution.

References in corpus (6)

• Spin Transfer Torques
• Current-driven vortex oscillations in metallic nanocontacts
• Soliton pair dynamics in patterned ferromagnetic ellipses
• Phase locking dynamics of dipolarly coupled vortex-based spin transfer oscillators
• Spectroscopy of phonons and spin torques in magnetic point contacts
• Synchronization of spin-torque driven nanooscillators for point contacts on a quasi-1D nanowire: Micromagnetic simulations

Cited by in corpus (8)

• Robust mutual synchronization in long spin Hall nano-oscillator chains
• Spin wave-driven variable-phase mutual synchronization in spin Hall nano-oscillators
• Direct observation of magnetization dynamics generated by nano-contact spin-torque vortex oscillators
• Influence of field-like torque in synchronization of spin torque oscillators
• Synchrony breakdown and noise-induced oscillation death in ensembles of serially connected spin-torque oscillators
• Mutual synchronization in spin torque and spin Hall nano-oscillators
• Metrics for spin-based computing
• Efficient Synchronization of Dipolarly Coupled Vortex-Based Spin Transfer Nano-Oscillators