Revealing the Spin-Hamiltonian and Characteristic Parameters of Paramagnetic Centers in Cu2+-Doped Potassium Metabisulfite (K2S2O5) Single Crystal by Electron Paramagnetic Resonance Technique |
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Authors: | İlkay Yıldırım Bünyamin Karabulut |
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Affiliation: | 1. Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayis University, Kurupelit, 55139, Samsun, Turkey 2. Department of Computer Engineering, Faculty of Engineering, Ondokuz Mayis University, Kurupelit, 55139, Samsun, Turkey
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Abstract: | The present study is mainly related to finding out spin-Hamiltonian parameters of Cu2+-doped potassium metabisulfite [K2S2O5] single crystals using electron paramagnetic resonance (EPR) technique which has been applied in the temperature range from 297 to 113 K for single and powder crystals of the title compound. The existence of two complexes and two Cu2+ sites for each complex was concluded from the angular variation of the EPR spectra. Having constructed the g and the hyperfine tensors, the spin-Hamiltonian parameters have been obtained for these two complexes. Using these parameters, the covalency parameter (α 2), mixing coefficients (α and β) and Fermi contact term (K) have been calculated. |
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