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Title: Absorption studies of tripositive praseodymium and neodymium doped zinc fluoride borophosphate (ZFBP) glasses
Authors: Sharma, Y K
Dubedi, R P
Joshi, V
Karnataka, K B
Surana, S S L
Issue Date: Feb-2005
Publisher: CSIR
Series/Report no.: C03C 3/00
Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="Street"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="address"> Zinc fluoride borophosphate (ZFBP) glasses doped with tripositive praseodymium and neodymium ions have been prepared by melt quenching technique. The final composition of glasses in mol.% is 15.44 B<sub>2</sub>O<sub>3</sub> – 39.77 P<sub>2</sub>O<sub>5</sub> -17.36 Na<sub>2</sub>O – 16.67 Al<sub>2</sub>O<sub>3</sub> – 10.74 ZnF<sub>2</sub> – R Ln (where R= 0.0, 0.1, 0.3 and 0.5 mol % and Ln = Pr<sup>3+</sup> and Nd<sup>3+</sup>). The absorption spectra of doped ZFBP glasses have been recorded at room temperature. Eight absorption bands have been observed from the ground state <sup>3</sup>H<sub>4</sub> to excited states <sup>3</sup>F<sub>2, </sub><sup>3</sup>F<sub>3, </sub><sup>3</sup>F<sub>4, </sub><sup>1</sup>G<sub>4,</sub> <sup>1</sup>D<sub>2</sub>, <sup>3</sup>P<sub>0</sub>, <sup>3</sup>P<sub>1</sub> and <sup>3</sup>P<sub>2</sub> in Pr<sup>3+</sup> doped ZFBP glasses and twelve absorption bands from the ground state <sup>4</sup>I<sub>9/2</sub> to excited states <sup>4</sup>F<sub>3/2</sub>, <sup>4</sup>F<sub>5/2</sub>, <sup>4</sup>F<sub>7/2</sub>, <sup>4</sup>S<sub>3/2</sub>, <sup>4</sup>F<sub>9/2</sub>, <sup>2</sup>H<sub>11/2</sub>, <sup>4</sup>G<sub>5/2</sub>, <sup>4</sup>G<sub>7/2</sub>, <sup>4</sup>G<sub>9/2</sub>, <sup>2</sup>G<sub>9/2</sub>, <sup>4</sup>G<sub>11/2</sub>, and <sup>2</sup>P<sub>1/2</sub> in the case of Nd<sup>3+</sup> doped ZFBP glasses. From these spectral data various energy interaction parameters like Slater-Condon parameter <i style="">F</i><sub>k</sub> (<i style="">k</i>=2, 4, 6), Lande´ parameter ξ<sub>4f</sub> and Racah parameters <i style="">E</i><sup>k</sup> (<i style="">k</i>=1,2,3) have been computed. Nephelauxetic ratio (<img src='/image/spc_char/beta.gif' border=0>') and bonding parameters (<i style="">b</i><sup>1/2</sup>) have also been computed from these parameters to study the nature of bonding in doped glasses. The intensities of the f-f transitions in the absorption spectra have been analyzed by the application of the Judd-Ofelt theory. J-O parameters (Ω<sub>λ</sub>) have been computed. Ω<sub>λ</sub> parameters of ZFBP glasses have been compared with those of similar glasses to infer the nature of bonding in these glasses. </smarttagtype></smarttagtype>
Description: 65-74
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.12(1) [February 2005]

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