Electron Paramagnetic Resonance Study of Manganese in Strontium Fluoride

Abstract

The room‐temperature, electron paramagnetic resonance spectrum of a dilute (0.01%) substitution of Mn²⁺ ions in a single crystal of SrF₂ has been measured. The parameters of the manganese resonance measured at 9.507 GHz are $\text{g\hspace{0.17em}=\hspace{0.17em}2.0014\hspace{0.17em}±\hspace{0.17em}0.0010}$ and ${\text{|\hspace{0.17em}A\hspace{0.17em}|\hspace{0.17em}=\hspace{0.17em}(94.0\hspace{0.17em}±\hspace{0.17em}1.9)\hspace{0.17em}×\hspace{0.17em}10}}^{\text{−4}}{\mathrm{cm}}^{\text{−1}}$ . The cubic field splitting was not resolved. The magnitude of the nearest neighbor hyperfine interaction with surrounding fluorines is ${\mathrm{|\hspace{0.17em}A}}_s{\text{\hspace{0.17em}|\hspace{0.17em}=\hspace{0.17em}(8.11\hspace{0.17em}±\hspace{0.17em}0.70)\hspace{0.17em}×\hspace{0.17em}10}}^{\text{−4}}{\mathrm{cm}}^{\text{−1}}$ and ${\mathrm{|\hspace{0.17em}A}}_p{\text{\hspace{0.17em}|\hspace{0.17em}=\hspace{0.17em}(2.02\hspace{0.17em}±\hspace{0.17em}0.25)\hspace{0.17em}×\hspace{0.17em}10}}^{\text{−4}}{\mathrm{cm}}^{\text{−1}}$ , indicating 0.68% $\sigma$ character in the manganese‐to‐fluorine bond. $A_p$ is in agreement with the calculated magnetic dipolar interaction between manganese and fluorine nuclei, assuming no $p_{\sigma }$ bonding and no lattice distortion. These results are compared with similar data on ZnF₂, CaF₂, CdF₂, KMgF₃, CdTe, and BaF₂.