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Title: Magnetic and orbital order in overdoped bilayer manganites
Authors: Maitra, Tulika
Taraphder A.
Published in: Europhysics Letters
Abstract: The magnetic and orbital orders for the bilayer manganites in the doping region 0.5 < x < 1.0 have been investigated from a model that incorporates the two eg orbitals at each Mn site, the inter-orbital Coulomb interaction and lattice distortions. The usual double exchange operates via the eg orbitals. It is shown that such a model reproduces much of the phase diagram recently obtained for the bilayer systems in this range of doping. The C-type phase with (π, 0, π) spin order seen by Ling et al. appears as a natural consequence of the layered geometry and is stabilised by the static distortions of the system. The orbital order is shown to drive the magnetic order while the anisotropic hopping across the eg orbitals, the layered nature of the underlying structure and the associated static distortions largely determine the orbital arrangements.
Citation: Europhysics Letters (2004), 65(2): 262-268
Issue Date: 2004
ISSN: 2955075
Author Scopus IDs: 7004183343
Author Affiliations: Maitra, T., Max-Planck-Inst. Phys. Komplexer S., Nöthnitzer Str. 38, 01187 Dresden, Germany
Taraphder, A., Department of Physics, Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India, Abdus Salam Intl. Ctr. Theor. Phys., Strada Costiera 11, 34014 Trieste, Italy
Corresponding Author: Maitra, T.; Max-Planck-Inst. Phys. Komplexer S., Nöthnitzer Str. 38, 01187 Dresden, Germany; email:
Appears in Collections:Journal Publications [PH]

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