Physical reservoir computing utilizing spin dynamics in serial magnetic bits

Abstract Physical reservoir computing (RC) utilizing spin dynamics in serial magnetic bits has been demonstrated based on a micromagnetic simulator. An 8-layered cylindrical magnetic wire stores 3 rewritable bits as up/down magnetization directions and the spin dynamics in the top layer is detected as a time-series response signal to a time-series pulse currents. The dynamical properties were found to change with the bit pattern. Using time-domain signals from all the 8 bit patterns, RC was performed to achieve high computational capacities in two benchmark tasks. With exploration of the number of bit patterns, a scalable guideline for performance enhancement was found.