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Updated: Jul 3, 2026

Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Magnetic structure and electronic study of complex oxygen-deficient manganites
Raquel Cortés-Gil1,2, María Hernando1, M Luisa Ruiz-González1
1Dpto. Química Inorgánica, Facultad de Químicas, Universidad Complutense de Madrid, 28040 Madrid (Spain), Fax: (+34) 91-3944342.
Abstract:
Neutron diffraction and X-ray absorption near-edge structure (XANES) studies have been performed in La0.5Ca0.5MnO2.5, La0.5Sr0.5MnO2.5 and Nd0.5Sr0.5MnO2.5 oxygen-deficient perovskite compounds obtained by topotactic reduction. They all exhibit a brownmillerite structure with G-type antiferromagnetic ordering. Mn2+, Mn3+ and Mn4+ coexist at the octahedral sites, whereas only Mn2+ is placed in the tetrahedral positions. A magnetic moment of 1.6 microB has been detected at the tetrahedral layers, which can be explained by assuming Mn2+ is in a low-spin configuration.
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