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Nanocomposite stability in Fe-, Co-, and Mn-based perovskite/spinel systems

Published online by Cambridge University Press:  11 April 2012

Joerg Hoffmann ,
Sven Schnittger ,
Jonas Norpoth ,
Stephanie Raabe ,
Thilo Kramer  and
Christian Jooss
Joerg Hoffmann*
Affiliation:
Institute of Materials Physics, University of Goettingen, 37077 Goettingen, Germany
Sven Schnittger
Affiliation:
Institute of Materials Physics, University of Goettingen, 37077 Goettingen, Germany
Jonas Norpoth
Affiliation:
Institute of Materials Physics, University of Goettingen, 37077 Goettingen, Germany
Stephanie Raabe
Affiliation:
Institute of Materials Physics, University of Goettingen, 37077 Goettingen, Germany
Thilo Kramer
Affiliation:
Institute of Materials Physics, University of Goettingen, 37077 Goettingen, Germany
Christian Jooss
Affiliation:
Institute of Materials Physics, University of Goettingen, 37077 Goettingen, Germany
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Fabrication of thin film nanocomposites via decomposition and self-assembly from the vapor phase is a promising path for cost-effective fabrication of multifunctional materials. In particular, oxides as a new class of energy materials allow for rich functionalities, e.g., by combining p- and n-doped systems in catalytic or light harvesting units. Combining A-site doped perovskites ABO3 with CoFe2O4 spinel, we have investigated thin film phase composition and nanocomposite morphology in the pseudobinary system La0.6Sr0.4BO3–CoFe2O4 for B = Fe, Co, and Mn. We observe formation of an epitaxial two-phase nanocomposite for B = Fe, i.e., the coexistence of La0.6Sr0.4FeO3 and CoFe2O4. In contrast, for B = Co or Mn nanocomposites are formed, where perovskite La0.6Sr0.4BO3 solid solutions coexists with Co-rich spinel and periclase phases. We derive conclusions for the preparation of perovskite-spinel nanocomposites with well-designed doping levels.

Keywords

CompositeOxideSelf-assembly
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 11 , 14 June 2012 , pp. 1462 - 1470
Copyright
Copyright © Materials Research Society 2012

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