Abstract
It is demonstrated that asymptotic temporal behavior of thermal noise is responsible for the universality of long-time thermal relaxations in hysteretic systems. By using the Preisach hysteresis model and by assuming stationary Gaussian noise, the ln t intermediate asymptotics for the thermal relaxations is derived along with a simple expression for the viscosity coefficient in terms of temperature and differential susceptibility. Experimental data supporting these analytical results are presented.
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