Domains and Distances in Magnetic Systems

A bstra ct . When one compares t he time evolution of two spin configura tions subjected to the same t hermal noise, domains appea r of ident ical and opposite spins . We st udy these domains and their growt h for three magnetic systems in two dime nsions: ferromagnet, spin glass, and non-symmetric spin glass. For Ierromagnet s, t hese distan ce associated domains are very similar to the magnetic domains. For spin glasses, t hey have a larger st ruct ure than the clusters of frozen spins an d they move in tim e. For non-symmetric spin glasses, small dist ance associated domai ns move quickly whereas there are no frozen spins .