Energy Levels and Predicted Absorption Spectra of Rare-Earth Ions in Rare-EarthArsenides

摘要

A crystal-field Hamiltonian for octahedral symmetry was used along with free-ionparameters for aqueous solution to fit the reported optical absorption spectra of Er(3+) in ErAs. Predictions showed excellent agreement with reported experimental data at so 74, and 300 K. Consequently, we used an interpolation procedure to predict the crystal-field splittings of the lower multiplets of the rare-earth ions Tb(3+) through Yb(3+) in their respective arsenide compounds. The lowest multiplet energy levels predicted for Tm(3+) and Yb(3+) compare favorably with measurements made by inelastic neutron scattering. In addition, we calculate the absorption spectra for Tb(3+), Dy(3+), Ho(3+), TM(3+), and Yb(3+) in their respective arsenide compounds at 4.2, 77, and 300 K. From these calculations, we show the transitions between the levels of the lowest two J multiplets for each of the ions.... Rare-earth arsenides, Rare-earth spectra.