Nanoscale Memory Retention: The Superparamagnetic Limit (2D)

This top-down 2D companion to the 3D nanoscale-memory simulator renders the same 12×12 lattice of bistable magnetic grains, each one storing a single bit as its magnetization direction. Real nanoscale memory faces a hard physical constraint: the Néel–Arrhenius law, which sets how long a stored bit survives thermal agitation before it randomly flips. Write a pattern, then watch grains flip at a rate governed by grain size, temperature and material anisotropy — shrink the grains or raise the temperature and the whole lattice crosses into the superparamagnetic regime, where data decays in nanoseconds instead of years. Drag to pan and scroll to zoom the grid, and watch live readouts of the theoretical relaxation time τ, elapsed simulated time, mismatched bits and overall data retention.