Synchronization of an array of spin torque nano oscillators in periodic applied external magnetic field

Abstract

Considering an array of spin torque transfer nano oscillators (STNOs), we have investigated the synchronization property of the system under the action of a common periodically driven applied external magnetic field by numerically analyzing the underlying system of Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equations for the macro-spin variables. We find the novel result that the applied external magnetic field can act as a medium to induce synchronization of periodic oscillations, both in-phase and anti-phase, even without coupling through spin current, thereby leading to the exciting possibility of enhancement of microwave power in a straightforward way.

6 pages, 8 figures, accepted for publication in Europhysics Letters

References in corpus (5)

• The Fascinating World of Landau-Lifshitz-Gilbert Equation: An Overview
• Coupling efficiency for phase locking of a spin transfer oscillator to a microwave current
• Impact of the electrical connection of N Spin Transfer Oscillators on their synchronization : an analytical study
• Chaotic Dynamics of Spin-Valve Oscillators
• Bifurcation and chaos in spin-valve pillars in a periodic applied magnetic field

Cited by in corpus (7)

• Frequency enhancement and power tunability in tilted polarizer spin-torque nano oscillator
• Enhanced synchronization in an array of spin torque nano oscillators in the presence of oscillating external magnetic field
• Synchronization and chaos in spin-transfer-torque nano-oscillators coupled via a high speed Op Amp
• Phase locking of spin transfer nano-oscillators using common microwave sources
• Exact Intrinsic Localized Excitation of an Anisotropic Ferromagnetic Spin Chain in External Magnetic Field with Gilbert Damping, Spin Current and PT-Symmetry
• Influence of field-like torque in synchronization of spin torque oscillators
• Large Amplitude Spin-Hall Oscillations due to Field-like Torque