Effects of Heat Treatment of Thin Ferromagnetic Films at Intermediate Temperatures

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Abstract
Iron‐nickel films deposited in vacuo in the presence of a magnetic field have been annealed in an inert environment. It has been established that, when the annealing is performed in an orienting field of 30 oe, initial magnetic properties of these films can be altered provided that the initial temperature is high enough. If a field is applied at right angles to the original preferred direction and in the plane of the film, the magnitude of the magnetic anisotropy can be reduced without changing the preferred direction; the preferred direction of magnetization can be changed if the anneal temperature is sufficiently high. This last effect confirms the observations of Williams and Sherwood.

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