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Structural and electrical properties of Ba5SmTi3V7O30 ceramics

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Abstract

Polycrystalline sample of Ba5SmTi3V7O30 was prepared by a high-temperature solid-state reaction technique. Structural and microstructural characterizations were performed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). X-ray preliminary structural studies reveal that the material has orthorhombic structure at room temperature. Detailed electrical (dielectric and impedance) properties of the material studied by using a complex impedance spectroscopy (CIS) technique in a wide temperature range (33–450 °C) at different frequencies (102–106 Hz) reveal that the relative dielectric constant of the material increases with rise in temperature and thus bulk has a major contribution to its dielectric and electrical properties. The bulk resistance of the material decreases with rise in temperature exhibiting a typical negative temperature coefficient of resistance (NTCR) behavior. The nature of the temperature variation of conductivity and value of activation energy, suggest that the conduction process is of mixed-type (ionic–polaronic and space charge). The existence of ferroelectricity in the compound was confirmed from polarization study.

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Authors and Affiliations

  1. Department of Physics, Betnoti College Betnoti, Mayurbhanj, Orissa, India

    P. S. Sahoo

  2. Department of Physics, D.N. College, Itanagar, Arunachal Pradesh, India

    A. Panigrahi

  3. Department of Physics & Meteorology, IIT, Kharagpur, 721302, India

    S. K. Patri & R. N. P. Choudhary

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  1. P. S. Sahoo
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  2. A. Panigrahi
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  3. S. K. Patri
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  4. R. N. P. Choudhary
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Correspondence to R. N. P. Choudhary.

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Sahoo, P.S., Panigrahi, A., Patri, S.K. et al. Structural and electrical properties of Ba5SmTi3V7O30 ceramics. J Mater Sci: Mater Electron 21, 160–167 (2010). https://doi.org/10.1007/s10854-009-9887-2

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