Collective electron ferromagnetism II. Energy and specific heat

Abstract

A treatment of collective electron ferromagnetism on the basis of FermiDirac statistics was developed in a previous paper (Stoner 1938 a , referred to as I). The problem considered was that of the magnetic characteristics associated with electrons in an energy band of standard form (in which the energy density of states is proportional to the square root of the energy), and subject to interchange interaction effects which involve dependence of the energy on the magnetization. The distribution of states is specified by a parameter e 0 , giving the maximum electron energy at absolute zero in the absence of the magnetization dependent part of the interchange interaction energy.