Arévalo López, Ángel M.Castillo Martínez, ElisabetAlario Franco, Miguel Ángel2023-06-202023-06-2020080953-898410.1088/0953-8984/20/50/505207https://hdl.handle.net/20.500.14352/53017We present the experimental ELNES spectra of the Cr-L2,3 and O-K edges in three high pressure synthesized perovskites, ACrO3 (A = Ca, Sr and Pb). A comparison of the experimental spectra against the theoretical calculations shows the influence of the A cation in the features of the spectrum. The Cr-L2,3 multiplet structure of these perovskites shows similar integrated intensity ratio (IL3/IL2) between them and with the CrO2, implying that all of them are indeed composed by Cr4+. But the O-K pre-edge observed in CrO2, typical of its d3L character (L-ligand hole), is not present in these perovskites. The effect of the A cation manifests itself in the O-K edge. The different features in the peak edges are caused by the change in the interaction between oxygen and the A cation from being via p orbitals (with Pb) to being via d orbitals (with Ca, Sr). The experimental spectra of the samples are reproduced well by the presented DFT calculations.spaElectron energy loss spectroscopy in ACrO3 (A = Ca, Sr and Pb) perovskitesjournal articlehttp://www.iop.org/EJ/journal/JPhysCMopen access546perovskiteshigh pressureeelsdftQuímica inorgánica (Química)Física del estado sólidoMateriales2303 Química Inorgánica2211 Física del Estado Sólido3312 Tecnología de Materiales