Signature of multiferroicity and pyroelectricity close to room temperature in BaFe12O19 hexaferrite |
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Affiliation: | 1. Florida Institute of Technology, Physics and Space Sciences Department, Melbourne, Florida, 32901, USA;2. Florida Institute of Technology, Systems Engineering Department, Melbourne, Florida, 32901, USA |
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Abstract: | In this paper, we have reported the signature of multiferroicity and pyroelectricity in BaFe12O19 hexaferrite close to room temperature. The BaFe12O19 hexaferrite samples are synthesized by co-precipitation method at different sintering temperature ranging from 800 to 1200 °C and study their structural, ferroelectric, magnetic, magnetoelectric and pyroelectric properties. X-ray Diffraction patterns show the pure phase formation for all samples. Morphological changes are examined through the scanning electron microscope. The maximum ferroelectric polarization (0.66 μC/cm2) is observed for the sample sintered at 1200 °C, however maximum magnetic polarization 74 emu/g is observed for sample sintered at 1000 °C. Magneto-electric coupling measurements are also performed through dynamic method and average magneto-electric coupling coefficient (~ 7.05 × 10?7 mV/cm Oe2) is observed at room temperature for the sample sintered at 1200 °C. Furthermore, maximum pyroelectric constant (147 × 10?13C/cm2 °C) is observed at 75 °C for BaFe12O19 samples sintered at 1200 °C. The observation of both multiferroicity and pyroelectricity close to room temperature in BaFe12O19 hexaferrite is interesting and useful for multifunctional devices. |
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Keywords: | Magnetoelectric Pyroelectric Sintering temperature |
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