Open AccessFrom double exchange to superexchange in charge ordering perovskite manganites
Author(s) -
W Bao,
J.D. Axe,
C H Chen,
S W Cheong,
P Schiffer,
M. Roy
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/307963
Subject(s) - superexchange , antiferromagnetism , condensed matter physics , ferromagnetism , perovskite (structure) , manganite , electron , ground state , charge ordering , charge (physics) , materials science , physics , chemistry , crystallography , atomic physics , quantum mechanics
The authors found dynamic ferromagnetic correlations at the room temperature in perovskite manganites which have an antiferromagnetic insulating ground state. They are replaced by antiferromagnetic correlations when the electrons order. The results indicate that the double exchange mechanism is turned off by electron localization at low temperatures