Zeeman spectroscopy and crystal-field analysis of low symmetry centres in Nd 3+ doped Y 2 SiO 5 .

We report on infrared to visible Zeeman absorption spectroscopy and parametrised crystal-field modelling of Nd 3+ centres in Y 2 SiO 5 through the use of experimentally inferred crystal-field energy levels and Zeeman directional electronic g values. We demonstrate that good agreement between the calculated and experimental crystal-field energy levels as well as directional Zeeman g values along all three crystallographic axes can be obtained. Further, we demonstrate that the addition of
correlation crystal field effects successfully account for discrepancies that arise between the calculated and experimental values relevant to the 2 H 11/2 (2) multiplet in a one-electron crystal field model.