Premium
Microscopic theory of magnetic interactions in KCuF 3 and LaMnO 3 – The role of charge transfer
Author(s) -
Oleś Andrzej M.,
Feiner Louis Felix,
Horsch Peter,
Khaliullin Giniyat
Publication year - 2006
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.200562494
Subject(s) - superexchange , antiferromagnetism , condensed matter physics , charge (physics) , mott insulator , spin (aerodynamics) , insulator (electricity) , exchange interaction , physics , ferromagnetism , chemistry , quantum mechanics , thermodynamics , optoelectronics
We analyze the spin exchange interactions J ab and J c in the A ‐type antiferromagnetic phase of KCuF 3 and LaMnO 3 . One finds that the quasi one‐dimensional spin interactions in KCuF 3 are consistent with the charge‐transfer type of insulating state, while the modifications of J ab and J c by the charge‐transfer superexchange terms are moderate in the Mott insulator LaMnO 3 . We point out on the example of LaMnO 3 that a reliable determination of the experimental microscopic parameters of spin‐orbital models is possible only when results of magnetic and optical experiments can be combined. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)