Abstract
The manganites with general formulae R 0.5 A 0.5 MnO 3 (3D-manganite), R 0.5 A 1.5 MnO 4 (layered manganite), and RA 2 Mn 2 O 7 (bilayer manganite) where R 3+ is rare-earth ion, A 2+ is alkaline-earth ion, are known as charge ordered compounds at low temperatures with some R and A. In present work, it is shown how the charge ordering and crystal structure form the orbital and magnetic ones. The model of orbitally-dependent superexchange and single-ion anisotropy is used. Also we assume an ideal insulating state of the crystals. The model presented in this work allows to explain the CE- and A- magnetic structures in the terms of charge and orbital structures.
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Gontchar, L.E., Nikiforov, A.E. The formation of the magnetic structure of charge ordered 3D and layered manganites: The crucial role of the orbital structure. Czech J Phys 52 (Suppl 1), A245–A248 (2002). https://doi.org/10.1007/s10582-002-0059-3
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DOI: https://doi.org/10.1007/s10582-002-0059-3