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EPR and optical absorption studies on VO2+ions in KZnClSO4·3H2O single crystals—an observation of superhyperfine structure

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
64
Issue
8
Identifiers
DOI: 10.1016/s0022-3697(03)00158-6
Keywords
  • D. Epr

Abstract

Abstract EPR spectra of VO 2+ ions doped in KZnClSO 4·3H 2O single crystals have been studied at different temperatures. The EPR spectrum shows a well-resolved hyperfine and superhyperfine structure patterns. The angular variation of EPR spectra reveals the presence of more than three magnetic complexes, which correspond to distinct sites of VO 2+ ion. From the angular variation EPR data, the spin-Hamiltonian parameters are evaluated and discussed. The optical absorption spectrum studied at room temperature shows bands corresponding to C 4 v symmetry. From the EPR and optical data, the molecular-orbital bonding coefficient ε 2 and β 2 are evaluated and discussed. The observed five-line superhyperfine structure has been attributed to four protons (with I=1/2) from the surrounding water molecules of one of the vanadyl sites.

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