First Observation of Orthorhombic Jahn-Teller EPR Spectra in Cu(II) doped (NH4)2Cd2(SO4)3 (ACS) Single Crystals. Paper I
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Since the first experimental confirmation of axial Jahn-Teller effect in Cu(II) doped ZnSiF6.6H2O in 1950, the
Orthorhombic Jahn-Teller Effect (OJTE) in solids has not been clearly observed experimentally even though a lot of
conjectures have been made. This is the first report of experimental observation of orthorhombic Jahn-Teller EPR spectra 2E
Cu(II) ion in cadmium ammonium sulphate crystal providing the direct confirmation of the OJTE. The spectra correspond to
all the three Jahn-Teller potential well minima being non-equivalent in energy. The detailed theoretical analysis (not reported
here) of the spectra led to evaluation of many spectroscopic parameters and their temperature dependence, suggesting
potential applications of such systems.
Keywords
Q Science (General), QC Physics