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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA PHYSICA - Issue no. Sp. Issue / 2003 | |||||||
Article: |
THE FINE STRUCTURE OF THE EPR SPECTRA OF THE CHROMIUM IONS IN NON-CRYSTALLINE SOLIDS. Authors: LAVINIA COCIU. |
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Abstract: The features of the fine structure of the EPR spectra of the chromium ions in non-crystalline solids are discussed. The EPR spectra of Cr3+ ion in polycrystalline materials and the shift of the spectral features in terms of the E/D values are analysed. The computer simulation of some experimental EPR spectra of borate glasses reveals the presence of chromium in its tri- (d3) and penta- (d1) valence states ; the found Hamiltonian parameters of Cr3+ ions are g=1.98, D=0.216 cm-1 and E/D = 0.330. For Cr5+ ions, the symmetry of the -tensor changes from cubic (g=1.978) to axial (gx = gy = 1.98; gz = 1.93), when the Na2O content in glasses increases. | |||||||
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