Electron paramagnetic resonance and optical absorption spectra of Cu 2+ ions in alkali cadmium borosulphate glasses
Electron paramagnetic resonance spectra at 9.205 GHz have been examined at 300 K for a series of Cu 2+ ion doped alkali cadmium borosulphate (R 2SO 4-B 2O 3-CdSO 4; R = Li, Na, K or Cs) glasses. From the observed spectra, the spin-Hamiltonian parameters have been evaluated. It was found that the spi...
Saved in:
Published in | The Journal of physics and chemistry of solids Vol. 53; no. 9; pp. 1221 - 1226 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
1992
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Electron paramagnetic resonance spectra at 9.205 GHz have been examined at 300 K for a series of Cu
2+ ion doped alkali cadmium borosulphate (R
2SO
4-B
2O
3-CdSO
4; R = Li, Na, K or Cs) glasses. From the observed spectra, the spin-Hamiltonian parameters have been evaluated. It was found that the spin-Hamiltonian parameters are independent of the alkali ion present in the glass. The values of the spin-Hamiltonian parameters indicate that Cu
2+ ions in alkali cadmium borosulphate glasses are present in octahedral coordination with a strong tetragonal distortion. The theoretical value of the optical basicity ( Λ
th) of glasses has also been evaluated. The optical absorption spectra of Cu
2+ ion doped glasses show a single broad absorption band which is attributed to a
2
B
1g→
2
B
2g transition. By correlating the EPR and optical data, the molecular orbital coefficient β
2
1 and the normalized covalency parameter
▪ for Cu
2+ ions have been evaluated. |
---|---|
ISSN: | 0022-3697 1879-2553 |
DOI: | 10.1016/0022-3697(92)90042-C |