Divalent manganese in tetragonal sites of Cs2NaYCl6

摘要

Electron paramagnetic resonance (EPR) studies performed at room tempertaure in Mn2+doped Cs2NaYCl6single crystals (elpasolite) showed that the Mn2+ion occupies a tetragonal symmetry site in the cubic crystalline lattice. In contrast with previous results on elpasolite, where trivalent rare earth impurities occupyOhsites, and divalent europium impurities occupy trigonal sites, this work reports, the first evidence of an impurity in a tetragonal symmetry site in this host with principal axes along lang;100rang; crystallographic directions. The unusually large total splitting of the EPR spectrum (sim;10thinsp;000times;10minus;4cmminus;1) is discussed in order to establish a tentative model for the site.