Analysis of Mn²⁺ EPR spectral shapes for studies of the oxyfluoride glass ceramics

We investigated the EPR superhyperfine structure of the Mn²⁺ ion in the disordered BaF₂ crystalline media which tends to crystallize in the oxyfluoride glass-ceramics material. Obtained EPR spectra reveal explicit shf structure due to Mn²⁺ ion building into the BaF₂ lattice showing its usefulness as a probe in orientationally disordered and amorphous structures. Two types with explicit shf structure of Mn²⁺ ion characteristic EPR spectra were obtained in BaF₂ powder samples characteristic with broad (type 1) and narrow (type 2) hyperfine structure lines. Spectra of the ZnF₂-BaF₂ oxyfluoride glass-ceramics samples revealed explicit fine structure lines.