Jahn-Teller distortion relaxation across the LaMnO3+Delta phase diagram
authors Lopes, AML; Amaral, VS; Correia, JG; Araujo, JP
nationality International
journal JOURNAL OF PHYSICS-CONDENSED MATTER
keywords ORDER-DISORDER TRANSITION; OXYGEN-CONTENT; FUEL-CELLS; PEROVSKITE; CATALYSTS; LOCALIZATION; LA1-XSRXMNO3; TEMPERATURE; DIFFRACTION; DEFECTS
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.
publisher IOP PUBLISHING LTD
issn 0953-8984
year published 2013
volume 25
issue 38
digital object identifier (doi) 10.1088/0953-8984/25/38/385602
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000323816400015
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journal analysis (jcr 2017):
journal impact factor 2.617
5 year journal impact factor 2.385
category normalized journal impact factor percentile 60.448
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