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EPR studies on an ''unperturbed'' CrO/sub 4//sup 3 -/ center in K/sub 2/SO/sub 4/ crystals

Journal Article · · J. Chem. Phys.; (United States)
OSTI ID:6221048
Electron paramagnetic resonance of CrO/sup 2 -//sub 4/ doped K/sub 2/SO crystals has been studied after x-irradiation at 77 K. The resulting species, a CrO/sub 4//sup 3 -/ center, has the principal g values g/sub x/ = 1.8743, g/sub y/ = 1.8507, and g/sub z/ = 1.9386. The EPR data indicate a small distortion of CrO/sub 4//sup 3 -/ tetrahedra. A temperature variation study of the spectra in the range 1.6--77 K shows that they broaden rapidly above 10 K and no motionally averaged spectrum is observed. The experimental results are discussed in terms of several effects including a possible Jahn--Teller effect.
Research Organization:
Groupe de Physico-Chimie du Solide, Universite de Geneve, 30, Quai E. Ansermet, 1211 Geneva 4, Switzerland
OSTI ID:
6221048
Journal Information:
J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 82:2; ISSN JCPSA
Country of Publication:
United States
Language:
English