THE JAHN-TELLER EFFECT IN EXCITED STATES OF OCTAHEDRAL $Mn^{++}$

Abstract

We have made a quantitative treatment of the Jahn-Teller effect in various excited states of $Mn^{++}$ in $RbMnF_{3}$, a cubic crystal. The simplification of the experimental and theoretical work acheived by using this material gives us a chance to use the results as guides to the Jahn-Teller effect in other materials. The types of experiemtal work will be described and the estimates of the Jahn-Teller forces for various excited states will be discussed.