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Transport and complex modulus study of La0.7Ca0.3MnO3 perovskite manganite nano-compound with polypyrrole as host

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Abstract

The paper focuses on the facile synthesis of polypyrrole/La0.7Ca0.3MnO3 perovskite magnetic nano-composites synthesized by in situ chemical oxidation method using ammonium persulfate as oxidant. The morphology and crystal phase of the prepared samples were analyzed using SEM, TEM and XRD, respectively. Electrical conductivity, dielectric constant, dielectric loss, complex electric and impedance modulus studies were invested in the frequency range of 100 Hz–5 MHz at room temperature using AC impedance analyzer. The composites show frequency dependence with relaxation mechanism. The electric and impedance modulus analysis reveals the presence of non-Debye-type relaxation process and the effect of both grain and grain boundary on the transport properties of the composites.

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Acknowledgements

The author is thankful to The Principal, BMS College of Engineering, Bangalore, for the cooperation and providing the necessary facility. The author is indebted to The Principal, RNS Institute of Technology, Bangalore, for his cooperation. The author also thanks World Bank-funded project Centre of Excellence on Advanced Materials Research under TEQIP 1.2.1.

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Authors and Affiliations

  1. Department of Physics, RNS Institute of Technology, Bangalore, Karnataka, 560 098, India

    M. G. Smitha

  2. Department of Physics, BMS College of Engineering, Bangalore, Karnataka, 560 019, India

    M. V. Murugendrappa

  3. Center of Excellence in Advanced Materials Research, BMS College of Engineering, Bangalore, Karnataka, 560 019, India

    M. V. Murugendrappa

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  1. M. G. Smitha
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Correspondence to M. G. Smitha.

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Smitha, M.G., Murugendrappa, M.V. Transport and complex modulus study of La0.7Ca0.3MnO3 perovskite manganite nano-compound with polypyrrole as host. Polym. Bull. 76, 5363–5380 (2019). https://doi.org/10.1007/s00289-018-2653-y

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