Change of hyperfine and transferred hyperfine interaction of Eu2+ in CdF2, CaF2, SrF2, and BaF2 |
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Authors: | Klaus Baberschke |
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Affiliation: | 1. II. Physikalisches Institut, Technische Hochschule Darmstadt, Germany
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Abstract: | ENDOR measurements of the hyperfine and transferred hyperfine interaction of Eu2+ in CdF2, SrF2, and BaF2 were performed. Compared with measurements on CaF2, there is a radial shifting of the next fluorine ligands in CdF2∶ +5.4%, CaF2∶ + 3.5%, and BaF2∶ ?3.9%. Since the SrF2 and EuF2 lattice constants are approximately equal, a shifting in SrF2 was not assumed. In both europium isotopes (151 and 153) a change of hyperfine fields at the nucleus was observed. This can be explained qualitatively by the difference in radial distribution of the different europium orbitals. Also noticed was a small change of the hyperfine anomaly, which indicates contributions of the zero-point vibration. |
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