Abstract

We report Monte Carlo simulations of low-temperature hysteresis of +/-J Ising triangular lattices. A hysteresis loop similar to the one shown by real spin glasses is found. Such loop is divided in six sectors, according to the coordination number. Average hysteresis curves, obtained over large numbers of randomly prepared samples, are discussed for different values of temperature (T): it is found that the hysteresis loop disappears for T greater than or equal to 2.2J. Characteristics of the zero-temperature curve are explained by probabilistic analysis. (C) 2000 Elsevier Science B.V. All rights reserved.