Synchronization of an array of spin torque nano oscillators in periodic applied external magnetic field
Centre for Nonlinear Dynamics, Department of Physics, Bharathidasan University Tiruchirapalli - 620 024, India
Received: 4 January 2013
Accepted: 14 March 2013
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.
PACS: 75.78.-n – Magnetization dynamics / 05.45.Xt – Synchronization; coupled oscillators / 75.40.Mg – Numerical simulation studies
© EPLA, 2013