FTIR, Raman, EPR and optical absorption spectral studies on V2O5-doped cadmium phosphate glasses

✍ Scribed by N. Kerkouri; M. Haddad; M. Et-tabirou; A. Chahine; L. Laânab

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 553 KB
• Volume: 406
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2011.04.057

✦ Synopsis

Vanadium doped cadmium phosphate glasses xV 2 O 5 -(50 À x)CdO-50P 2 O 5 with 0 rx r20 mol% were prepared and FTIR, Raman, EPR and optical absorption measured. Infrared and Raman investigations show the formation of P-O-V and V-O-V bonds, which replace P-O-P ones. The simulations of EPR spectra of most glass samples 2.5 r x r 10 mol% reveal a superposition of two resonance signals. Spin Hamiltonian parameters indicate that the VO 2 þ ions are present in octahedral sites with tetragonal compression and belong to C 4v symmetry. The molecular bonding coefficient b 2 1 and e 2 p show an appreciable degree of covalency.