Evidence of equal Jahn-Teller coupling to Eg and T2g modes in KMgF3:Fe2+ from far infrared studies |
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| Authors: | T. Ray J.R. Regnard J.M. Laurant A. Ribeyron |
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| Affiliation: | D.R.F., Centre d''Etudes Nucléaires de Grenoble, B.P. 85, Centre de Tri, 38041, Grenoble-Cedex, France;C.R.T.B.T., Centre National de la Recherche Scientifique, B.P. 166, Centre de Tri, 38042, Grenoble-Cedex, France |
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| Abstract: | From a study of the dependence of the far infrared (f.i.r.) spectra of KMgF3:Fe2+ on impurity concentration and temperature, we identify them as due to magnetic dipole transition between the J = 1 and J = 2 states of Fe2+ and a resonant mode. The novelty of the work lies in demonstrating that in KMgF3:Fe2+ the electronic orbital triplet is equally coupled to the Eg and T2g modes of vibration and consequently vibronic interactions maintain the J-degeneracies. |
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