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Study on Structural/Magnetic Properties Correlation of Multiferroic Perovskite Bismuth Ferrite (BiFeO3) |
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PP: 31-36 |
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Author(s) |
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M. I. Marzouk,
H. M. Hashem,
S. Soltan,
A. A. Ramadan,
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Abstract |
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| The structural characterization and magnetic investigations of perovskite bismuth ferrite were studied using Xray diffraction (XRD) and superconducting quantum interference device (SQUID) magnetometer, respectively. Raman spectroscopy investigation was performed in order to confirm the obtaining of bismuth ferrite (BiFeO3) structural phase. The optimum conditions for the synthesis of bismuth ferrite sample was found to be 600 oC and 800 oC /6 hours for the first and second sintering stage, respectively. The sample has been melted as sintering temperature ascended above of 800 oC. Rietveld refinement was applied for quantitative phase analysis. The Neel temperature of bismuth ferrite was 538 K as determined from the electrical resistivity measurement as a function of temperature. A magnetic phase transition from metallic (Para magnetic) into insulator (Anti ferromagnetic) state was observed at the Neel temperature. A room temperature weak ferromagnetic behaviour is observed in BiFeO3 (BFO) sample that is referred to the spin canting configuration. |
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