Some Magnetic Properties of Dy Metal

Abstract

The magnetic moment of dysprosium has been measured in applied fields of 4000-18 000 oersteds, over the temperature range of 4.2-202°K. The susceptibility of dysprosium was found to be field dependent below about 175°K. Below 90°K, dysprosium appeared to have true though abnormal ferromagnetic properties, confirming the previous work of Trombe. At hydrogen and helium temperatures the magnetization isotherms fell below the 31°K isotherm. An absolute saturation magnetic moment of at least 8 Bohr magnetons was indicated by the data obtained in the temperature range of 31°K to 80°K. The magnitude of the measured values of the magnetic moment of dysprosium indicated that the orbital angular momentum of the $4f$ electrons contributes to the ferromagnetism.