The Structure Sensitiveness of Magnetism in Metals

The magnetic susceptibility of copper, silver, platinum and bismuth was measured for the annealed state and after various degrees of cold work. The cold work consisted of twisting, stretching and pounding. In every case the cold work decreased the diamagnetism (Cu, Ag, Bi), or increased the paramagnetism (Pt). This probably explains the variation in the measured values of metallic susceptibilities as due to a structure sensitiveness. This is attributed to the increase in the paramagnetic contribution of the party bound electrons of the metal due to the cold work; the electrical conductivity is usually decreased.