EPR studies of strontium alkali borate glasses doped with vanadium

被引：0
|
作者：
Hameed, Abdul [1 ,2 ]
Srinivas, B. [1 ]
Edukondalu, A. [1 ]
Shareefuddin, M. [1 ]
Chary, M. Narasimha [1 ]
机构：
[1] Osmania Univ, Dept Phys, Hyderabad 500007, Andhra Pradesh, India
[2] Nizam Coll, Dept Phys, Hyderabad 500001, Andhra Pradesh, India
来源：
PHYSICS AND CHEMISTRY OF GLASSES-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART B | 2015年 / 56卷 / 06期
关键词：
ELECTRON-PARAMAGNETIC-RESONANCE; LI2O-NA2O-B2O3; GLASSES; IONS; CONDUCTIVITY; SPECTRA; SINGLE;
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Electron paramagnetic resonance (EPR) studies were made on 10Li(2)O-10Na(2)O-10K(2)O-xSrO-(68-x)B2O3-2V(2)O(5) glasses. The glasses were prepared by the conventional melt quenching method and amorphous nature of the glass samples was confirmed by x-ray diffraction. From the EPR spectra the spin -Hamiltonian parameters were evaluated. It was observed that the V4+ ions are present as VO2+ vanadyl ions in octahedral coordination with tetragonal compression and belong to C-4v symmetry, with d(xy) ground state. The measure of tetragonality Delta g(parallel to)/Delta g(perpendicular to) varies in a nonlinear manner with SrO content which may be due to change in the ligand field strength at the site V4+ ion site. The covalency rates indicated moderate covalency for the sigma- and pi-bonds. The number of spins participating in the resonance (N) and susceptibility (chi) were evaluated, and found to vary with SrO content.
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页码：263 / 266
页数：4
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