Copper-containing zinc phosphate glasses have been studied for copper contents up to 15 mol% by changing the non-metal-to-metal ratio of the matrix. Optical measurements in the u.v.-visible range as well as e.s.r. analyses were carried out in order to provide structural information about the copper configuration in the system. Strong evidence was obtained for the existence of two different copper pairs. In view of these results and using a modified form of the equation of Austin and Mott for the d.c. conductivity, an analysis of the role of the spatial correlation of copper centers in fixing the hopping behaviour was performed, which stresses the importance of introducing a realistic description of the coordinative geometry of the transition-metal ion in the conductivity model in order to give a full account of the electrical behaviour of the system.

Narducci, D., Mari, C., Pizzini, S., & Morazzoni, F. (1987). SPECTROMAGNETIC EVIDENCE FOR SPATIAL CORRELATION OF COPPER CENTERS IN PHOSPHATE-GLASSES AND ITS EFFECT ON THE CHARGE-TRANSPORT PROCESSES. JOURNAL OF THE CHEMICAL SOCIETY. FARADAY TRANSACTIONS I, 83, 3587-3602 [10.1039/f19878303587].

SPECTROMAGNETIC EVIDENCE FOR SPATIAL CORRELATION OF COPPER CENTERS IN PHOSPHATE-GLASSES AND ITS EFFECT ON THE CHARGE-TRANSPORT PROCESSES

NARDUCCI, DARIO;MARI, CLAUDIO MARIA;PIZZINI, S;MORAZZONI, FRANCA
1987

Abstract

Copper-containing zinc phosphate glasses have been studied for copper contents up to 15 mol% by changing the non-metal-to-metal ratio of the matrix. Optical measurements in the u.v.-visible range as well as e.s.r. analyses were carried out in order to provide structural information about the copper configuration in the system. Strong evidence was obtained for the existence of two different copper pairs. In view of these results and using a modified form of the equation of Austin and Mott for the d.c. conductivity, an analysis of the role of the spatial correlation of copper centers in fixing the hopping behaviour was performed, which stresses the importance of introducing a realistic description of the coordinative geometry of the transition-metal ion in the conductivity model in order to give a full account of the electrical behaviour of the system.
Articolo in rivista - Articolo scientifico
Scientifica
phosphate glass, copper, charge transport, EPR
English
3587
3602
16
Narducci, D., Mari, C., Pizzini, S., & Morazzoni, F. (1987). SPECTROMAGNETIC EVIDENCE FOR SPATIAL CORRELATION OF COPPER CENTERS IN PHOSPHATE-GLASSES AND ITS EFFECT ON THE CHARGE-TRANSPORT PROCESSES. JOURNAL OF THE CHEMICAL SOCIETY. FARADAY TRANSACTIONS I, 83, 3587-3602 [10.1039/f19878303587].
Narducci, D; Mari, C; Pizzini, S; Morazzoni, F
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/32316
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