Memory Behaviour of the Spin Glass Relaxation

Isothermal magnetization measurements on a Cu Mn 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.