Electron paramagnetic resonance enhanced crystal field analysis for low point-group symmetry systems: C${}_{2v}$ sites in Sm${}^{3+}$:CaF${}_2$/SrF${}_2$

Abstract

We present a comprehensive spectroscopic study of C${}_{2v}$ point-group symmetry sites in Sm${}^{3+}$:CaF${}_2$/SrF${}_2$ codoped with either NaF or LiF. Data includes electron paramagnetic resonance measurements of Zeeman and hyperfine interactions for the ground state, as well as site-selective excitation and fluorescence spectroscopy up to the ${}^4$G${}_{5/2}$ multiplet. Inclusion of the EPR data allowed us to determine unique crystal-field parameters. The parameters provide information about the geometry of the sites and the nature of the interactions between the Sm${}^{3+}$ dopant and the alkaline earth co-dopant.

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• Reproduction of the electronic and magnetic structure of the low symmetry sites of Y${}_2$SiO${}_5$ doped with Sm${}^{3+}$ via a parameterized crystal-field model
• Spectroscopy and Crystal-Field Analysis of Low -Symmetry Er${}^{3+}$ Centres in K${}_2$YF${}_5$ Microparticles