Fig. 6: Summarization of saturation magnetization and volume anisotropy energy density optimization results.
a The saturation magnetization (Ms) and volume anisotropy energy density (Ku) pairs for the top five configurations of each of the spin–orbit torque (SOT) and spin transfer torque (STT) devices found via reinforcement learning (RL) and evolutionary algorithm (EA) approaches. The SOT and STT devices generally favor configurations that have stronger perpendicular magnetic anisotropy (PMA), though the SOT devices favor weaker Ms than the STT devices. (b, c) Sample bitstreams generated using the top SOT configuration found by RL and EA approaches. d, e Sample bitstreams generated using the top STT configuration found by RL and EA approaches.
