The Magnetoresistance of Nickel in Large Fields

The magnetoresistance of a nickel foil has been measured in fields up to 24,000 gauss. A drop of the curves in large fields is found, in disagreement with Alocco's results on similar material, but in agreement with Gerlach's theory that a resistance decrease is produced proportional to the square of the increase of spontaneous magnetization. The constant of proportionality is shown to be dependent on the temperature. It is concluded that spontaneous magnetization may be increased by a magnetic field without saturation appearing, even up to fields of 200,000 gauss as produced by Kapitza.