THE MAGNETIC MOMENT OF TRIVALENT RARE-EARTH IONS IN IONIC LASER CRYSTALS

摘要

The efficiency of laser crystals doped with trivalent rare-earth (RE) ions depend on the degree of the homogeneous distribution of the concentration of the RE ion in the crystal volume. In this study, the concentration of the Pr~(3+) ions in the KY_3F_(10) wide band gap dielectric crystal host was determined by measuring the magnetic moment of the Pr~(3+) ions using the vibrating sample magnetometer (VSM) method, for the first time to the best of our our knowledge. With this experimental method the concentration of the RE ions could be determined to within a 0.1% accuracy in a non-destructive way. In addition, by applying laser-nduced fluorescence spectroscopy in the vacuum ultraviolet region of the spectrum (100-200nm), the magnetic properties of the 4f~(n-1)5d electronic configurations can be predicted from optical spectra of electronic excited states lying 8 eV above the ground electronic state of the 4f~n electronic configuration.