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Mössbauer Effect for Fe 57 in CoCl 2 and CoF 2
Author(s) -
Cavanagh J. F.
Publication year - 1969
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.19690360229
Subject(s) - auger , chemistry , spectral line , ion , mössbauer spectroscopy , doping , charge (physics) , analytical chemistry (journal) , absorption spectroscopy , absorption (acoustics) , auger effect , mössbauer effect , atomic physics , materials science , nuclear magnetic resonance , condensed matter physics , crystallography , physics , optics , organic chemistry , quantum mechanics , astronomy , chromatography , composite material
The Mössbauer effect for Fe 57 in CoCl 2 and CoF 2 has been measured by using them as sources in a resonant absorption experiment. While the CoCl 2 spectra indicate only a 2+ charge state for the Fe 57 ion, the CoF 2 spectra indicate both a 3+ and a 2+ charge state. When a sample of CoF 2 is used as an absorber doped with a small amount of iron enriched in Fe 57 , however, only 2+ charge state lines appear in the absorption spectra. This is interpreted as resulting from a local environment change associated with Auger aftereffects following K‐capture. The internal magnetic field has been estimated for each compound below its Néel temperature. Values of (49 ± 2) kOe for CoCl 2 and (245 ± 2) kOe for CoF 2 were found at 10 and 11 °K, respectively, for the field at an Fe 2+ nucleus.
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