Some Observations on the Movement and Demagnetization of Ferromagnetic Particles in Alternating Magnetic Fields

The movement of ferromagnetic particles in various types of alternating magnetic fields and the mechanisms involved are discussed. The conditions under which demagnetization takes place in magnetic fields produced by damped high frequency oscillatory discharges are described, and possible practical applications to the magnetic separation of ores and to routine laboratory magnetic testing of iron and steel are indicated.