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Electron microscopy and electron energy-loss spectroscopy study of Nd 1-x Sr x CoO 3-δ (0 ≤ x ≤ 1) system

Electron microscopy and electron energy-loss spectroscopy study of Nd 1-x Sr x CoO 3-δ (0 ≤ x ≤ 1) system

Microscopy and Microanalysis 20(3): 687-691

A solid solution of Nd 1-x Sr x CoO 3-δ (with x=0, 1/3, 2/3, and 1) has been prepared and characterized by a combination of X-ray diffraction, electron microscopy, and electron energy-loss spectroscopy (EELS). The structural characterization indicates that Nd-doped materials present an orthorhombic symmetry with a=√2xa p, b=√2xa p, and c=2xa p (a p refers to lattice parameter of simple cubic perovskite), while SrCoO2.5 has an orthorhombic symmetry with a=√2xa p, b=4xa p, and c=√2xa p. EELS analysis revealed that Co are in 3+ oxidation states but in different spin configurations.

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Accession: 052925755

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PMID: 24576358

DOI: 10.1017/S1431927614000336

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