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Multiferroic properties of Bi1/2Sr1/2FeO3
Published in
2009
Volume: 105
   
Issue: 7
Abstract
Polycrystalline Bi12 Sr12 Fe O3 was synthesized by solid state reaction method. Powder x-ray diffraction pattern of the sample was fitted using a noncentrosymmetric rhombohedral crystal system of space group R3c. The sample was found to be free from any secondary phases. This single phase material exhibits simultaneously ferrimagnetism and ferroelectricity with magnetic and electrical Curie transitions at TCM =745 K and TCE =465 K, respectively. Origin of this spontaneous magnetic order is discussed using the superexchange interaction between Fe ions. The observed ferroelectric polarization is explained based on the spontaneous ordering of 6 s2 lone pair electrons of Bi3+ ions and a possible coexistence of charge-ordering of site- and bond-centered types. © 2009 American Institute of Physics.
About the journal
JournalJournal of Applied Physics
ISSN00218979
Open AccessNo
Concepts (24)
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    CHARGE ORDERINGS
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    CURIE TRANSITIONS
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    FE-IONS
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    FERROELECTRIC POLARIZATIONS
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    LONE-PAIR ELECTRONS
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    Magnetic orders
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    Multiferroic properties
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    Non-centrosymmetric
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    Poly-crystalline
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    POWDER X-RAY DIFFRACTIONS
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    RHOMBOHEDRAL CRYSTALS
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    Secondary phasis
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    SINGLE-PHASE MATERIALS
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    SOLID-STATE REACTION METHODS
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    SPACE GROUP R3C
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    SUPER-EXCHANGE INTERACTIONS
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    Ferroelectricity
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    HOLOGRAPHIC INTERFEROMETRY
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    Iron compounds
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    Iron oxides
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    Ozone water treatment
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    Polarization
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    Solid state reactions
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    Diffraction