ELECTRON-PARAMAGNETIC-RESONANCE STUDY OF THE VANADYL ION IN XCOO.(1-X)(ZNO.2B(2)O(3)) GLASSES

Citation
S. Khasa et al., ELECTRON-PARAMAGNETIC-RESONANCE STUDY OF THE VANADYL ION IN XCOO.(1-X)(ZNO.2B(2)O(3)) GLASSES, Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic, 76(6), 1997, pp. 859-865
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied",Mechanics,"Physics, Condensed Matter","Material Science
ISSN journal
1364-2812
Volume
76
Issue
6
Year of publication
1997
Pages
859 - 865
Database
ISI
SICI code
1364-2812(1997)76:6<859:ESOTVI>2.0.ZU;2-#
Abstract
Glasses with the composition xCoO.(1-x)(ZnO.2B(2)O(3)) have been prepa red in the CoO concentration range 0 less than or equal to x less than or equal to 0.24 containing 2 mol% V2O5. Electron paramagnetic resona nce (EPR) spectra of VO2+ of these glasses have been measured at the X -band frequency nu approximate to 9.14 GHz, at room temperature and al liquid-nitrogen temperature. Spin-Hamiltonian parameters of the VO2ions have been calculated. It is found that for x less than or equal t o 0.15 the octahedral symmetry of the V4+ site is improved. Parts of t hese glasses were annealed at 373 and 573 K for 2 h and EPR spectra we re recorded and analysed. Theoretical optical basicity values of the s amples were calculated and ii was found that the predictions made by t hese calculated values are in agreement with the experimental findings .