Control of Information Flow in Arrays of Spin-Torque Oscillators

Arrays of spin-torque oscillators (STOs) can be used in neural networks. Adjacent STOs can be synchronised via magnetostatic interactions. In this work we show that by varying the diameter of the STOs it is possible to control the flow of information. Unidirectional information flows can be enabled by a consistent change in diameter along a row of STOs. A switch to control the direction of information flow can be constructed using rows of STOs with different diameters.