Orientation of Nuclei in Ferromagnets

Abstract

A theoretical discussion is given of the various orientation effects acting on nuclei in ferromagnets, and the results are compared to experimental measurements on the specific heat and the anisotropy in the emission of $\gamma$ rays by radioactive ${\mathrm{Co}}^{60}$. The orientation is due to an effective magnetic field which is, neglecting some small terms, the sum of one negative and four positive contributions all of which are roughly comparable. The uncertainty in the total field predicted is considerable but nevertheless rough agreement is obtained with the few experimental results at present available.