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.
@article{arxiv.1304.0875,
title = {Synchronization of an array of spin torque nano oscillators in periodic applied external magnetic field},
author = {B. Subash and V. K. Chandrasekar and M. Lakshmanan},
journal= {arXiv preprint arXiv:1304.0875},
year = {2014}
}
Comments
6 pages, 8 figures, accepted for publication in Europhysics Letters