This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1016/j.ssi.2008.12.027 in citations.
Crystal structure, thermochemical stability, electrical and magnetic properties of the two-phase composites in the La0.8Sr0.2MnO3-CeO2 system
Crystal structure, thermochemical stability, electrical and magnetic properties of the two-phase composites in the La0.8Sr0.2MnO3-CeO2 system
Crystal structure, thermochemical stability, transport and magnetic properties of compositions in the (100-x) La(0.8)Sr(0.2)MnO(3 +/- delta)xCeO(2) (LSMC) system were studied. All compositions in the LSMC series containing more than 2 mol% CeO2 were two phase and consisted of the modified perovskite...
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Personal Name(s): | Konysheva, E. |
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Irvine, J.T.S. / Besmehn, A. | |
Contributing Institute: |
Zentralabteilung für Chemische Analysen; ZCH |
Published in: | Solid state ionics, 180 (2009) |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2009
|
DOI: |
10.1016/j.ssi.2008.12.027 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Solid State Ionics
180 |
Subject (ZB): | |
Publikationsportal JuSER |
Crystal structure, thermochemical stability, transport and magnetic properties of compositions in the (100-x) La(0.8)Sr(0.2)MnO(3 +/- delta)xCeO(2) (LSMC) system were studied. All compositions in the LSMC series containing more than 2 mol% CeO2 were two phase and consisted of the modified perovskite constituent with rhombohedral structure (R3c) and ceria as a secondary phase with cubic structure (Fm3m). The presence of both Ce4+ and Ce3+ cations in LSMC compositions was revealed by X-ray Photoelectron Spectroscopy (XPS). CeO2 and compositions in the LSMC series showed good thermochemical stability in air and argon. However. in H-2-Ar atmosphere all LSMC compositions underwent reduction followed by decomposition. Transport and magnetic properties change in a non-linear way with the increase in the CeO2 content. The LSMC2 composition showed enhanced electronic conductivity and magnetic characteristics. Metallic type conductivity was observed for LSMC compositions with x <= 36 mol% CeO2 in a narrow temperature range of 770-900 degrees C. A small degree of substitution of Ce into LSM was found to change structural, magnetic and electrical properties. (C) 2009 Elsevier B.V. All rights reserved. |