The magnetostriction coefficients of nickel

Measurements of the magnetostriction have been made, by means of the strain gauge technique, at room temperature, and at 79 and 5 K , and the results have been analysed in terms of the usual five-coefficient expression for a cubic crystal. The lack of parallelism between the applied magnetic field and the magnetization, due to the magnetic anisotropy, was allowed for by a method which enabled values of the anisotropy coefficients K1K2 and K3 to be deduced. The magnetostriction coefficients h3 and h5 are zero within the experimental uncertainties at all three temperatures and h3 is certainly too small to produce any significant contribution to K1. The temperature dependence of h1 and h2 cannot be described by the theory of Callen & Callen (1963).