Microscopic theory of magnetic interactions in KCuF 3  and LaMnO 3  – The role of charge transfer | Zendy

Oleś Andrzej M. | Zendy; Feiner Louis Felix | Zendy; Horsch Peter | Zendy; Khaliullin Giniyat | Zendy

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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)

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