Reset-set latch logic operation using vortex-gyration-coupled modes and its driven switching in magnetic-dot networks: A micromagnetic simulation study

We explored, by micromagnetic simulations, a new-concept RS (reset-set) latch logic operation based on magnetic-dot networks comprised of physically separated but dipolar-coupled three disks in magnetic-vortex states. To devise this robust RS latch logic operation, we utilized the unique dynamic behaviors of both vortex-gyration-coupled modes and its driven vortex-core switching. For example, we demonstrated RS latch sequential logic operations by propagating gyration-coupled modes from both end disks to the middle disk and then stimulated vortex-core switching in the middle disk by specific coupled-mode signals. The advantages of this logic operation are the non-volatility of its bi-state core orientations, its switchability via signals of the coupled gyration modes, its low power consumption via resonance excitation of the gyration modes, and its use of lower-damping materials. This work offers guidance for the development of non-volatile, unlimited-endurance, all-magnetic-based RS latch logic operations.