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ENDOR Study of Cubic Fe 3+ Centres in KMgF 3
Author(s) -
Duvarney R. C.,
Niklas J. R.,
Spaeth J. M.
Publication year - 1981
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221030136
Subject(s) - ion , nearest neighbour , impurity , atomic physics , chemistry , spectral line , sign (mathematics) , resonance (particle physics) , crystallography , nuclear magnetic resonance , physics , mathematical analysis , mathematics , organic chemistry , astronomy , artificial intelligence , computer science
The superhyperfine (shf) interactions of the Fe 3+ impurity ion in KMgF 3 with its nearest neighbour (n.n.) and next‐nearest neighbours (n.n.n.) F − ions are determined. Using ENDOR‐induced ESR it could be shown that the cubic field splitting parameter has the same (positive) sign as the n.n. neighbour shf interaction. Weak satellites in the ESR and ENDOR‐induced ESR spectra are tentatively assigned to a hf interaction with the 2.2% abundant 57 Fe nucleus. The interpretation of the shf data in terms of a covalency and overlap model shows that the n.n.n. shf interaction can be explained as a transferred shf interaction via F − –F − ion core overlaps.