We have performed a complete resonant x-ray scattering (RXS) study at the Mn Kedge of LaMnO3. (h 0 0), (0 k 0) and (0 0 l) reflections with h, k and l=odd, were measured between 10 and 300 K. We observed strong resonant peaks at the three types of reflections. They exhibit dipolar character with a change of the light polarization plane from σ to π. The azimuth angular dependence of all these re...

1 Instituto de Ciencia de Materiales de Barcelona-Consejo Superior de Investigaciones Científicas, Bellaterra, Spain, 2 Center for Solid State Physics and New Materials, Institute of Physics Belgrade, University of Belgrade, Belgrade, Serbia, 3 Catalan Institute of Nanoscience and Nanotechnology, Consejo Superior de Investigaciones Científicas and The Barcelona Institute of Science and Technolo...

Abstract The Jahn–Teller (JT) effect, through geometric deformation of molecules or local ionic lattices, lowers the overall energy system by removing electron degeneracy from partially occupied orbitals. Crystal symmetry lowered JT distortion inevitably creates multiple variants elastic and orbital-anisotropic states. Visualization control domain/wall textures create a cornerstone to understan...

In this article, we describe the development of a new aerobic C–H oxidation methodology catalyzed by precious metal-free LaMnO3 perovskite catalyst. Molecular oxygen is used as sole oxidant in approach, obviating need for other expensive and/or environmentally hazardous stoichiometric oxidants. The electronic and structural properties catalysts were systematically optimized, reductive pretreatm...

The local and intermediate structure of stoichiometric LaMnO3 has been studied in the pseudocubic and rhombohedral phases at high temperatures (300-1150 K). Neutron powder diffraction data were collected and a combined Rietveld and high real space resolution atomic pair distribution function analysis was carried out. The nature of the Jahn-Teller (JT) transition around 750 K is confirmed to be ...