Some Physical Properties of Thin Magnetic Films

Abstract

In films of nickel iron evaporated under suitable conditions, the magnetocrystalline anisotropy is averaged out by the random array of small crystallites. The stress in the films cannot be eliminated but its effect is made insignificant by using alloys whose mean magnetostriction is zero. In these particular films, no evidence is found of angle of incidence effect but it is shown that they may contain traces of oxide. It is easier to obtain uniformity in magnetic properties of a number of elements in a plane if the magnetic film is made continuous and edge effects are excluded. No interaction takes place between adjacent areas when spaced $\frac{1}{2}\hspace{0.17em}\mathrm{cm}$ apart. This spacing can probably be reduced by a factor of at least two without interaction trouble.