Hysteresis properties of distributions of cubic single-domain ferromagnetic particles

Abstract For calculations of the ferromagnetic properties of single-domain particles having cubic anisotropy, a computing method is outlined for overcoming the indeterminacy of the magnetization orientation when magnetization reversal occurs. This is used to calculate the magnetization and remanent magnetization loops of random arrays of such particles. It is found for such systems that h c = 0·189 and 0·321, and h R = 0·204 and 0·333 for K<0 and K >0, respectively. The reduced super-paramagnetic transition temperature is 0–0417 for both cases. Comparisons are made between these calculations and the calculated properties of systems subject to uniaxial anisotropy.