Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19556
Title: Jahn-Teller distortion relaxation across the LaMnO3+Delta phase diagram
Author: Lopes, A. M. L.
Amaral, V. S.
Correia, J. G.
Araujo, J. P.
Keywords: ORDER-DISORDER TRANSITION
OXYGEN-CONTENT
FUEL-CELLS
PEROVSKITE
CATALYSTS
LOCALIZATION
LA1-XSRXMNO3
TEMPERATURE
DIFFRACTION
DEFECTS
Issue Date: 2013
Publisher: IOP PUBLISHING LTD
Abstract: The evolution of the local Jahn-Teller distortion across the LaMnO3+Delta phase diagram was obtained using the perturbed angular correlation local probe technique. We found that upon doping, the local distortion decreases continuously with increasing doping and that no fully Jahn-Teller distorted Mn3+O6 octahedra are observed within the orthorhombic insulating phase. A local single-phase scenario is established for the orbital disordered orthorhombic crystallographic structure. We also show that the continuous weakening of the Jahn-Teller distortions is not limited to a single-phase environment and occurs in a similar manner within an undistorted rhombohedric matrix upon lowering the temperature.
Peer review: yes
URI: http://hdl.handle.net/10773/19556
DOI: 10.1088/0953-8984/25/38/385602
ISSN: 0953-8984
Publisher Version: 10.1088/0953-8984/25/38/385602
Appears in Collections:CICECO - Artigos



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