Nanoscale Memory Retention: The Superparamagnetic Limit

This simulator renders a 12×12 lattice of nanoscale 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. Live readouts track the theoretical relaxation time τ, elapsed simulated time, mismatched bits and overall data retention.