An array of spin torque oscillators (STOs) for practical applications such as pattern recognition was recently proposed, where several STOs are connected by a common nonmagnet. In this structure, in addition to the electric and/or magnetic interactions proposed in previous works, the STOs are spontaneously coupled to each other through the nonmagnetic connector, due to the injection of spin current. Solving the Landau-Lifshitz-Gilbert equation numerically for such system consisting of three STOs driven by the spin Hall effect, it is found that both in-phase and antiphase synchronization of the STOs can be achieved by adjusting the current density and appropriate distance between the oscillators.
@article{arxiv.1901.07669,
title = {Coupled dynamics of magnetizations in spin-Hall oscillators via spin current injection},
author = {Tomohiro Taniguchi},
journal= {arXiv preprint arXiv:1901.07669},
year = {2019}
}