Designing large arrays of interacting spin-torque nano-oscillators for microwave information processing

Philippe Talatchian; Miguel Romera; Flavio Abreu Araujo; Paolo Bortolotti; Vincent Cros; Damir Vodenicarevic; Nicolas Locatelli; Damien Querlioz; Julie Grollier

doi:10.1103/physrevapplied.13.024073

arXiv · 1908.09908

Designing large arrays of interacting spin-torque nano-oscillators for microwave information processing

Philippe Talatchian·Miguel Romera·Flavio Abreu Araujo·Paolo Bortolotti·Vincent Cros·Damir Vodenicarevic·Nicolas Locatelli·Damien Querlioz·Julie Grollier

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Abstract

Arrays of spin-torque nano-oscillators are promising for broadband microwave signal detection and processing, as well as for neuromorphic computing. In many of these applications, the oscillators should be engineered to have equally-spaced frequencies and equal sensitivity to microwave inputs. Here we design spin-torque nano-oscillator arrays with these rules and estimate their optimum size for a given sensitivity, as well as the frequency range that they cover. For this purpose, we explore analytically and numerically conditions to obtain vortex spin-torque nano-oscillators with equally-spaced gyrotropic oscillation frequencies and having all similar synchronization bandwidths to input microwave signals. We show that arrays of hundreds of oscillators covering ranges of several hundred MHz can be built taking into account nanofabrication constraints.

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Philippe Talatchian, Miguel Romera, Flavio Abreu Araujo, Paolo Bortolotti, Vincent Cros, Damir Vodenicarevic, Nicolas Locatelli, Damien Querlioz, Julie Grollier. 2019-11-15. Designing large arrays of interacting spin-torque nano-oscillators for microwave information processing. https://doi.org/10.1103/physrevapplied.13.024073

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