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An EPR Study of a Neutral Manganese Center in NaCl
Author(s) -
Ikeya M.
Publication year - 1972
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.2220540233
Subject(s) - electron paramagnetic resonance , hyperfine structure , center (category theory) , manganese , hyperfine coupling , isotropy , chemistry , nuclear magnetic resonance , materials science , analytical chemistry (journal) , atomic physics , crystallography , physics , optics , metallurgy , chromatography
Abstract An EPR study of the Mn O ‐E center below room temperature was made in X‐irradiated and F‐bleached NaCl. In addition to the isotropic spectrum with g = 2.0018 and A = 19.5 × 10 −4 cm −1 at room temperature, the spectrum at low temperature shows fine structures with an axial field of D = 160 × 10 −4 cm −1 and 〈110〉 and 〈111〉 symmetries, which were analyzed from the shift of (M 8 = 1/2 ⇋ M 8 = −1/2) transitions. The temperature dependence of the hyperfine coupling constant shows anomalies. These results were discussed based on the assumption that the center is an off‐center.