MAGNETIC HYSTERESIS IN AN ISING-LIKE DIPOLE-DIPOLE MODEL

Using zero-temperature Monte Carlo simulations we have studied the mag netic hysteresis in a three-dimensional Ising model with nearest-neigh bor exchange and dipolar interaction. The average magnetization of spi ns located inside a sphere on a cubic lattice is determined as a funct ion of magnetic field varied periodically. The simulations have justif ied the appearance of hysteresis and allowed us to have a deeper insig ht into the series of metastable states developed during this process.