Electron Spin Resonance of Cu2+ Ion in CdWO4, ZnWO4, and MgWO4 Single Crystals

15 April 1966

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 44 (8) , 3078-3083
https://doi.org/10.1063/1.1727182

Abstract

Paramagnetic resonance measurements have been carried out at 78° and at 4°K on Cu²⁺ ions diluted in single crystals of CdWO₄, ZnWO₄, and MgWO₄. The g factors and the hyperfine interaction with the copper nucleus have been determined. From this experimental data the ground‐state wavefunction of the Cu²⁺ ion has been constructed. It has also been possible to calculate the relevant l=2 terms of the low‐symmetry crystal‐field components. Then in the framework of a simple g‐factor theory the g‐factor anisotropy has been calculated and compared with the measured anisotropy. The role of the distortion of the covalent π bonds has also been examined. In the case of MgWO₄ and ZnWO₄ a distinct temperature‐dependent g‐factor shift and a temperature‐dependent change of hyperfine interaction constants have been observed.

Keywords

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