Memory Behaviour of the Spin Glass Relaxation

Abstract

Isothermal magnetization measurements on a CuMn spin glass show that the memory behaviour of time relaxations in spin glasses is governed by the principle of superposition, which yields fundamental links between the time relaxations of the field-cooled, zero-field-cooled, isothermal-remanent and remanent magnetizations. The principle of superposition applies in spite of a continuous change of the response function at constant temperature, due to aging of the spin glass state.