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Issue 47, 2010
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Multiferroic ferrite/perovskite oxide core/shell nanostructures

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Abstract

A general combined hydrothermal and annealing process for the fabrication of ferrite/perovskite oxide core/shell nanostructures was introduced. The coating of a perovskite oxide (ABO3) layer on spherical ferrite particles was performed in two steps. A dense and smooth amorphous layer containing B-site ions of the perovskite oxide was coated first via a controlled hydrolysis and aging process. During hydrothermal treatment and subsequent annealing process, the A-site ions were incorporated in situ into the as-coated amorphous layer preserving the spherical morphology. This synthesis of ferrite/perovskite oxide core/shell nanostructures was demonstrated in systems like Fe3O4/PbTiO3, γ-Fe2O3/PbTiO3, γ-Fe2O3/Pb(Zr,Ti)O3, CoFe2O4/BaTiO3, CoFe2O4/PbTiO3 and CoFe2O4/Pb(Zr,Ti)O3. This method allowed the shell thickness of the composite particles to be manipulated in a controlled manner with various core sizes. After the coating, the core and shell materials showed strong interactions and the ferroelectric layer dramatically affected the crystal structure, resistivity and magnetic properties of the composites.

Graphical abstract: Multiferroic ferrite/perovskite oxide core/shell nanostructures

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Publication details

The article was received on 10 Aug 2010, accepted on 22 Sep 2010 and first published on 26 Oct 2010


Article type: Paper
DOI: 10.1039/C0JM02602F
Citation: J. Mater. Chem., 2010,20, 10665-10670
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    Multiferroic ferrite/perovskite oxide core/shell nanostructures

    R. Liu, Y. Zhao, R. Huang, Y. Zhao and H. Zhou, J. Mater. Chem., 2010, 20, 10665
    DOI: 10.1039/C0JM02602F

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