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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(08) [August 2004] >
| Title: | Spectroscopic and transport studies of Cu2+ doped in (30-x)Na2O-xNaF-50B2O3-20Bi2O3 glass system |
| Authors: | Suresh, Swapna S
Chandramouli, V |
| Keywords: | (30-x) Na2O-x NaF-50 B2O3-20 Bi2O3
Spectroscopic properties
Electrical conductivity
Glass |
| Issue Date: | Aug-2004 |
| Publisher: | CSIR |
| IPC Code: | G 01 J 3/12 |
| Abstract: | ESR, optical absorption, IR and dc electrical conductivity of
(30-x)Na2O-xNaF-50B2O3-20 Bi2O3
glass system have been investigated. From infrared results, it is observed that
the glass is made up of [BO3] and [BO4] units and in
fluorine rich glass B-F bonds are formed. ESR results show that Cu2+
has tetragonal distorted octahedral coordination and its ground
state is dx2-y2. The observed
changes in spin-Hamiltonian parameters with increasing concentration of NaF can
be attributed to the decrease in the field strength at Cu2+ ion site
.The decrease in a
value can be attributed to decreasing ionic character of the glass. The
existence of maxima of optical absorption at x =18 mole% of NaF is
attributed to the formation of BO2F2 structural units.
The dc electrtrical conductivity studies show that mobile ions are Na+
and the activation energy is attaining a maximum value at x =18 mole% of
NaF characterizing a mixed anion effect. |
| Page(s): | 560-564 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(08) [August 2004]
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