Abstract
AbstractThe components of the crystal field potential at a cadmium site in CdWO4 are evaluated using the point charge model and taking into account the effect of induced dipoles. The calculation is carried out in the direction of the magnetic z axis of Cu2+ in CdWO4 and Fe3+ in ZnWO4 by summing the monopoles up to 25000 and dipoles up to 1000. It is found that the dipolar contribution is substantial and alters the sign of the crystalline field component obtained from point‐charges only. As the value of this contribution is rather large, it is neccessary to take into account the covalency effect of the crystal and to reduce the charges of the diamagnetic ions. The ground state wave function of Cu2+ and the zero field splitting of Fe3+, determined from experiments, are in reasonable agreement with those obtained by this calculation.
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