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Updated: Feb 10, 2026

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Published on: May 11, 2019
Ferromagnetism and Charge Order from a Frozen Electron Configuration in Strained Epitaxial LaCoO_{3}
G E Sterbinsky1, R Nanguneri2, J X Ma3
1Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Abstract:
We report ordering of the cobalt electron configuration in ferromagnetic strained epitaxial LaCoO_{3}. Specifically, the presence of charge order is demonstrated from distinct features of the resonant cobalt contribution to superstructure reflections. Density functional theory calculations show that the observed order is consistent with the spin-state periodicity predicted to give rise to ferromagnetism in LaCoO_{3}. Through the modification of symmetry by strain, concurrent frozen charge and spin-state order are stabilized, giving rise to long-range magnetic order.
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