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In situ — High Temperature Mössbauer Spectroscopy of Iron Nitrides and Nitridoferrates
Author(s) -
Ksenofontov V.,
Reiman S.,
Waldeck M.,
Niewa R.,
Kniep R.,
Gütlich P.
Publication year - 2003
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200300135
Subject(s) - mössbauer spectroscopy , thermal decomposition , nitride , stoichiometry , decomposition , thermal stability , materials science , analytical chemistry (journal) , spectroscopy , in situ , chemistry , crystallography , nanotechnology , physics , organic chemistry , layer (electronics) , chromatography , quantum mechanics
The stoichiometric iron nitrides γ′‐Fe 4 N, ε‐Fe 3 N and ζ‐Fe 2 N were characterized by Mössbauer spectroscopy. The thermal decomposition of ε‐Fe 3 N was studied in‐situ by means of a specially developed Mössbauer furnace. We found ε‐Fe 3 N to γ′‐Fe 4 N and ε‐Fe 3 N x (x ≥ 1.3) as decomposition products and determined the border of γ′/ε transformation at T ≅ 930 K. Mössbauer spectroscopy was applied to study in‐situ the thermal decomposition of the nitridometalate Li 3 [Fe III N 2 ] and the formation of Li 2 [(Li 1‐ x Fe I x )N], the compound with the largest local magnetic field ever observed in an iron containing material. The kinetics of formation and the stability of Li 2 [(Li 1‐ x Fe I x )N] was of particular interest in the present study.