NICOUD, Sarah; HUVÉ, Marielle; HERNANDEZ, Olivier; PAUTRAT, Alain; DUTTINE, Mathieu; WATTIAUX, Alain; COLIN, Claire; KABBOUR, Houria; MENTRÉ, Olivier

doi:10.1021/jacs.7b06409

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NICOUD, Sarah
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

HUVÉ, Marielle
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

HERNANDEZ, Olivier
Institut des Sciences Chimiques de Rennes [ISCR]

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Article de revue

Ce document a été publié dans

Journal of the American Chemical Society. 2017-11-29, vol. 139, n° 47, p. 17031-17043

American Chemical Society

Résumé en anglais

The multiferroic LuFeO was recently proposed as a promising material for oxygen storage due to its easy reversible oxidation into LuFeO. We have investigated the similar scenario in YbFeO, leading to a slightly greater oxygen storage (OSC) capacity of 1434 μmol O/g. For the first time, the structural model of LnFeO was fully understood by high-resolution microscopy images, and synchrotron and neutron diffraction experiments, as well as maximum entropy method. The oxygen uptake promotes a reconstructive shearing of the [YbO] sub-units controlled by the adaptive Ln/Fe oxygen coordination and the Fe redox. After oxidation, the rearrangement of the Fe coordination polyhedra is unique such that all available FeO units (n = 6, 5, 4 in octahedra, square pyramids, trigonal bipyramids, tetrahedra) were identified in modulated rows growing in plane. This complex pseudo-ordering gives rise to short-range antiferromagnetic correlation within an insulating state.< Réduire

Mots clés en anglais

Crystal structure

Oxidation

Physical and chemical processes

Layers

Oxygen

DOI

http://dx.doi.org/10.1021/jacs.7b06409

Project ANR

Couplages Magnéto-Electriques exacerbés dans des matériaux à unités ferromagnétiques - ANR-16-CE08-0023

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026