Brownian computing by magnetic skyrmions

Abstract

The energy consumption associated with recent artificial intelligence has become even more critical. A new device to solve this problem, stochastic computing using room-temperature heat, has been proposed and demonstrated in spintronics by tuning the magnetic device and daring the spins to be susceptible to thermal fluctuations. Magnetic skyrmions, which are spin structures in magnetic thin films, behave as particles and exhibit thermal fluctuations of spins as Brownian motion in solid. This article introduces a “Brownian computer” that requires little external energy by the Brownian motion and describes the properties of Brownian motion of magnetic skyrmions and its control.