Crystal growth, EPR, and luminescence of BaZnF₄:Mn

Abstract

Abstract Pure and doped crystals of BaZnF 4 , are grown in graphite crucibles using the Bridgman technique. EPR measurements at Q‐band show one center of Mn 2+ with b = −301 ± 10; b = −185 ± 20 and A = −88.1 (all in units of 10 −4 cm −1 ). The latter value indicates exclusive occupation of Zn sites. For the first time different values of the intrinsic ZFS splitting parameter \documentclass{article}\pagestyle{empty}\begin{document}$\overline {b_2 }$\end{document} for bridging and nonbridging F − ions are required for the superposition analysis, but both values are close to those for Mn‐F in other systems. For low energy excitations a second low energy emission band is observed. In accordance with previous results it can be explained by the large distortion of the [MnF 2 F 4/2 ] 2− units.