Parametrized crystal-field analyses are presented for both the six and seven fold coordinated, C$_{ 1}$ symmetry Sm$^{ 3+}$ centers in Y$_{ 2}$SiO$_{ 5}$, based on extensive spectroscopic data spanning the infrared to optical regions. Laser site-selective excitation and fluorescence spectroscopy as well as Zeeman absorption spectroscopy performed along multiple crystallographic directions has been utilised, in addition to previously determined $g$ tensors for the $^{ 6}$H$_{ 5/2}$Z$_{ 1}$ and $^{ 4}$G$_{ 5/2}$A$_{ 1}$ states. The resultant analyses give good approximation to the experimental energy levels and magnetic splittings, yielding crystal-field parameters consistent with the few other lanthanide ions for which such analyses are available.
Categories: cond-mat.mtrl-sci physics.atom-ph quant-ph