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Diamagnetism and Superexchange Electron Interaction in Cs 2 Sb (IV) Cl 6 , Semiconducting Crystals
Author(s) -
Ionova G. V.,
Ionov S. P.,
Makarov E. F.,
Aleksandrov A. Yu.
Publication year - 1973
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.2220560223
Subject(s) - superexchange , diamagnetism , exchange interaction , condensed matter physics , electron , chemistry , crystallography , singlet state , ferromagnetism , physics , atomic physics , quantum mechanics , excited state , magnetic field
Crystals of Cs 2 Sb SbCl 6 Sb are diamagnetic and have a cubic structure of the antifluorite type. These facts may be explained either in terms of statistical disorder between Sb(III) and Sb(V) or in terms of electron exchange between SbCl − 6and SbCl 3− 6 . A calculation is presented of the exchange interaction between the nearest SbCl 2− 6complexes. The exchange integral £ is taken in form £ = ( E s − E t )/2 where E s and E t are energies of singlet and triplet states. It is established that CI atoms mainly contribute to the exchange interaction. Sign and value of the exchange integral correspond to an antiferromagnetically ordered state in Cs 2 SbCl 6 at room temperature.