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Electron Microscopy and Electron Energy-Loss Spectroscopy Study of Nd1−xSrxCoO3−δ (0≤x≤1) System

Published online by Cambridge University Press:  28 February 2014

Khalid Boulahya ,
Manar Hassan ,
Jesús C.G. Minguez  and
Stavros Nicolopoulos
Khalid Boulahya*
Affiliation:
Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
Manar Hassan
Affiliation:
Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
Jesús C.G. Minguez
Affiliation:
Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
Stavros Nicolopoulos
Affiliation:
NanoMEGAS, Boulvard Edmond Machtens 79, 1080 Bruxelles, Belgium
*
*Corresponding author. khalid@quim.ucm.es
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Abstract

A solid solution of Nd1−xSrxCoO3−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=√2xap, b=√2xap, and c=2xap (ap refers to lattice parameter of simple cubic perovskite), while SrCoO2.5 has an orthorhombic symmetry with a=√2xap, b=4xap, and c=√2xap. EELS analysis revealed that Co are in 3+ oxidation states but in different spin configurations.

Keywords

electron microscopyhigh-resolution electron microscopyelectron energy-loss spectroscopyperovskite
Type
EDGE Special Issue
Information
Microscopy and Microanalysis , Volume 20 , Issue 3 , June 2014 , pp. 687 - 691
Copyright
© Microscopy Society of America 2014 

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