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Infrared and Mössbauer Investigations of CdGa x Fe 2—x O 4 Spinels
Author(s) -
Mahmoud M.H.,
AbdElrahman M.I.,
M. Abdalla Atef,
AbdelMageed A.I.
Publication year - 2001
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 - 10.1002/1521-3951(200108)226:2<369::aid-pssb369>3.0.co;2-x
Subject(s) - octahedron , mössbauer spectroscopy , gallium , infrared spectroscopy , quadrupole splitting , spectral line , paramagnetism , crystallography , chemistry , infrared , quadrupole , analytical chemistry (journal) , nuclear magnetic resonance , materials science , crystal structure , physics , atomic physics , condensed matter physics , optics , organic chemistry , chromatography , astronomy
The Cd–Ga ferrite system CdGa x Fe 2— x O 4 (where x = 0, 0.6 and 1.0) was studied by means of infrared (IR) and Mössbauer spectroscopy. IR spectra revealed two prominent bands ν 1 and ν 2 which were assigned to tetrahedral and octahedral metal complexes, respectively. The position of the highest frequency band ν 1 showed an increase with increasing gallium concentration. The lowest band ν 2 was broadened and diffused with gallium substitution. Mössbauer spectra at room temperature exhibited paramagnetic doublet lines. As a result of distortion in the oxygen positions surrounding the B‐sites, the quadrupole interaction in the Mössbauer spectra increased with increasing gallium concentration. IR and Mössbauer spectra revealed the absence of Fe 2+ ions at both tetrahedral and octahedral sites.