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Cation Distribution and Magnetic Exchange Interactions in MgFe 2 O 4 Studied by the Mössbauer Effect
Author(s) -
De Grave E.,
Dauwe C.,
Govaert A.,
De Sitter J.
Publication year - 1976
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.2220730219
Subject(s) - hyperfine structure , ionic bonding , mössbauer spectroscopy , mössbauer effect , quenching (fluorescence) , chemistry , magnetic field , ion , ferrite (magnet) , distribution (mathematics) , exchange interaction , condensed matter physics , materials science , nuclear magnetic resonance , atomic physics , crystallography , ferromagnetism , physics , fluorescence , mathematical analysis , mathematics , organic chemistry , quantum mechanics , composite material
The quenching temperature dependence of the magnetic hyperfine fields at the Fe 57 nucleus in magnesium ferrite has been investigated by the Mössbauer effect technique. Since the outer absorption lines are broad and asymmetric, the average magnetic hyperfine field is calculated from the two most inner lines. Using a molecular field model and an equilibrium distribution law and taking into account the difference in covalency for the A‐ and B‐site Fe 3+ ions, reliable results are obtained concerning the magnetic exchange interactions and the ionic distribution in MgFe 2 O 4 .