The Weiss constant and its analytical solution for the effect of internal demagnetization

The paper describes a solution to the Weiss effective field, in closed form, by using an analytical approximation to the Everett integral. Its application is demonstrated on one of the magnetism’s difficult problems, the presence of molecular interaction and its consequence, the internal demagnetisation. The solution is based on the Weiss effective field theory and fits within the framework of the Classic Scalar Preisach hysteresis modeling.