  Magnetic skyrmions are promising candidates for next-generation information
carriers, owing to their small size, topological stability, and ultralow
depinning current density. A wide variety of skyrmionic device concepts and
prototypes have been proposed, highlighting their potential applications. Here,
we report on a bioinspired skyrmionic device with synaptic plasticity. The
synaptic weight of the proposed device can be strengthened/weakened by
positive/negative stimuli, mimicking the potentiation/depression process of a
biological synapse. Both short-term plasticity(STP) and long-term
potentiation(LTP) functionalities have been demonstrated for a spiking
time-dependent plasticity(STDP) scheme. This proposal suggests new
possibilities for synaptic devices for use in spiking neuromorphic computing
applications.
