Studies on Piezo-Magnetization (I)

Changes in the magnetization curves, magnetic susceptibility, and remanent magnetization of magnetite and titaniferous magnetite under uniaxial compression are experimentally examined in a systematic way. The uniaxial compression results in a reduction of the intensity of magnetization and the magnetic susceptibility of both single crystals and assemblages of fine grains of titaniferous magnetite.However, a removal of the compression from the samples in presence of a magnetic field results in an abrupt increase of magnetization, the resultant intensity of magnetization being larger than the ordinary magnetization without the effect of compression in the same field. The majority of the increased magnetization remains as the remanent magnetization after removal of the field. Thus, the isothermal remanent magnetization produced by removing uniaxial compression in a magnetic field increases with increasing magnitude of the uniaxial compression.