We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Chemical Analysis at Atomic Resolution of Isolated Extended Defects in an Oxygen-Deficient, Complex Manganese Perovskite.
- Authors
Ruiz‐González, M. Luisa; Cortés‐Gil, Raquel; Torres‐Pardo, Almudena; González‐Merchante, Daniel; Alonso, José M.; González‐Calbet, José M.
- Abstract
A general approach to the structural and analytical characterization of complex bulk oxides that exploits the advantage of the atomic spatial resolution and the analytical capability of aberration-corrected microscopy is described. The combined use of imaging and spectroscopic techniques becomes necessary to the complete characterization of the oxygen-deficient colossal magnetoresistant La0.56Sr0.44MnO2.5-related perovskite. In this compound, the formation of isolated (La/Sr)O and MnO rock-salt-type planar defects are identified from atomically resolved High Angle Annular Dark Field (HAADF) images. The location of the oxygen atomic columns from Annular Bright Field (ABF) images indicates edge-sharing MnO6 octahedra in the MnO planes and the study performed by Electron Energy Loss Spectroscopy (EELS) reveals different Mn oxidation states derived from the corner- or edge-sharing MnO6 octahedra environment.
- Subjects
PEROVSKITE; MAGNETORESISTANCE; ELECTRON energy loss spectroscopy; OCTAHEDRAL molecules
- Publication
Chemistry - A European Journal, 2014, Vol 20, Issue 5, p1237
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201303895