title: Electron microscopy and electron energy-loss spectroscopy study of Nd 1-x Sr x CoO 3-δ (0 ≤ x ≤ 1) system.
abstract: 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.
authors.affiliation: 1Departamento de Química Inorgánica, Facultad de Químicas,Universidad Complutense de Madrid,28040 Madrid,Spain.
authors.forename: Khalid
authors.initials: K
authors.lastname: Boulahya
authors.affiliation: 1Departamento de Química Inorgánica, Facultad de Químicas,Universidad Complutense de Madrid,28040 Madrid,Spain.
authors.forename: Manar
authors.initials: M
authors.lastname: Hassan
authors.affiliation: 1Departamento de Química Inorgánica, Facultad de Químicas,Universidad Complutense de Madrid,28040 Madrid,Spain.
authors.forename: Jesús C G
authors.initials: JC
authors.lastname: Minguez
authors.affiliation: 2NanoMEGAS,Boulvard Edmond Machtens 79,1080 Bruxelles,Belgium.
authors.forename: Stavros
authors.initials: S
authors.lastname: Nicolopoulos