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Title: ESR, infrared and optical absorption studies of Cu<sup>2+</sup> ion doped in 60B<sub>2</sub>O<sub>3</sub>-10TeO<sub>2</sub>-(30-<i style="">x</i>)MO-<i style="">x</i>PbO (M = Zn, Cd) glasses
Authors: Upender, G
Kamalaker, V
Vardhani, C P
Mouli, V Chandra
Keywords: IR
Optical absorption spectra
Cu<sup>2+</sup> spin probe
Issue Date: Aug-2009
Publisher: CSIR
Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceName" downloadurl=""><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceType" downloadurl=""><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place" downloadurl=""> ESR, IR and optical absorption studies on 60B<sub>2</sub>O<sub>3</sub>-10TeO<sub>2</sub>-(30-<i style="">x</i>)MO-<i style="">x</i>PbO (where M=Zn, Cd) glasses containing Cu<sup>2+</sup> spin probe have been carried out. The IR results prove the distribution of trigonal bipyramids (TeO<sub>3</sub>) which determines the network and the distribution of borate triangles (BO<sub>3</sub>) and borate tetrahedral (BO<sub>4</sub>) groups. Structural changes take place with variation of PbO content in BTZP and BTCP series. ESR results show that the <i style="">g</i><sub>|| ></sub> <i style="">g</i><sub>⊥</sub> indicating that the Cu<sup>2+</sup> ion is in tetragonal distorted octahedral site and its ground state is <b></b><sub><img src='/image/spc_char/dxy.gif'>.</sub> There are considerable changes in <i style="">g<sub>||</sub></i><sub>,</sub> <i style="">g</i><sub>⊥ </sub>and <i style="">A</i><sub>|| </sub>values with the increasing concentration of PbO in both BTZP and BTCP glass systems. The optical absorption spectra results show that the absorption peak of Cu<sup>2+</sup> is a function of composition. The observed optical absorption peak of Cu<sup>2+</sup> has been found to be maximum at 813 nm for <i style="">x</i>=30 mol% of PbO content. Bonding parameters are calculated from both optical and ESR data. All these variations clearly indicate the structural changes in the present glass systems with varying PbO content. </smarttagtype></smarttagtype></smarttagtype>
Description: 551-556
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.47(08) [August 2009]

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