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Temperature Dependence of Hyperfine Interactions in Near‐Stoichiometric FeS I. Experiment
Author(s) -
Thiel R. C.,
van den Berg C. B.
Publication year - 1968
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.19680290236
Subject(s) - stoichiometry , crystallite , neutron diffraction , mössbauer spectroscopy , hyperfine structure , phase transition , materials science , diffraction , condensed matter physics , phase (matter) , mössbauer effect , crystallography , chemistry , nuclear magnetic resonance , physics , crystal structure , atomic physics , optics , organic chemistry
Mössbauer measurements as a function of temperature are presented for three synthetic 57 Fe‐enriched polycrystalline samples of FeS in the composition region near stoichiometry. The independence of the Morin and α‐transitions, previously concluded from neutron diffraction measurements, has been verified. A low‐temperature transition has been found near 200 °K. It appears necessary to postulate the existence of a reversible, crystallographic two‐phase region between the α‐transition and about 200 °K in order to explain the Mössbauer measurements. This hypothesis also seems to provide a logical explanation of several anomalies in FeS.