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- W2040369564 abstract "Abstract The local structure of the tetragonal Er 3+ center in CaO is theoretically studied by using the perturbation formulas of the g factors for a 4f 11 ion in tetragonal symmetry. In these formulas, the contributions to the g factors from the second-order perturbation terms and the admixtures of various states are taken into account. Based on the investigations, this center is suggested to be the impurity Er 3+ substituting the host Ca 2+ site, associated with a Ca 2+ vacancy V Ca in the [100] (C 4 ) axis due to charge compensation. By studying the g factors of the tetragonal center, impurity Er 3+ is expected to undergo an off-center displacement ΔZ(≈ 0.2 Å ) towards the V Ca along the C 4 axis because of the electrostatic attraction. The calculated g factors based on the displacement ΔZ show reasonable agreement with the observed values." @default.
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- W2040369564 date "2005-04-01" @default.
- W2040369564 modified "2023-09-28" @default.
- W2040369564 title "Studies on the Local Structure of the Tetragonal Er3+ Center in CaO" @default.
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- W2040369564 doi "https://doi.org/10.1515/zna-2005-0409" @default.
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