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Investigation on structural and electrical properties of FeMnO3 synthesized by sol-gel method

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Abstract

Nanocrystalline FeMnO3 was synthesized by sol-gel method using succinic acid as a chelating agent. The structural and morphological characterizations of the synthesized material were carried out by using XRD, FT-IR, and SEM with EDX. The hysteresis loop at room temperature shows the antiferromagnetic behavior of the material. The variation in the frequency and temperature dependent dielectric constant illustrated the Maxwell-Wagner relaxation in the sample. Nyquist plot illustrated the grains resistance at higher frequency whereas at lower frequency it is dominated by the grain boundary resistance. The electrical modulus also confirms the relaxation process. The activation energy calculation of impedance and modulus shows the existence of oxygen vacancy. XPS analysis confirmed the existence of oxygen vacancy and different oxidation states of Fe3+/Fe2+ and Mn3+/Mn4+ in the material. Conductivity studies of the material were analyzed and fitted by using Jonscher Power law.

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Acknowledgements

Authors are grateful to VIT University for providing major financial support and excellent research facilities. The authors also thank Prof. S. Kalainathan, VIT University for providing the facilities to carry out dielectric studies.

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  1. School of Advanced Sciences, VIT University, Vellore, 632014, Tamil Nadu, India

    Laurel Simon Lobo & A. Rubankumar

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  1. Laurel Simon Lobo
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  2. A. Rubankumar
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Correspondence to A. Rubankumar.

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Lobo, L.S., Rubankumar, A. Investigation on structural and electrical properties of FeMnO3 synthesized by sol-gel method. Ionics 25, 1341–1350 (2019). https://doi.org/10.1007/s11581-018-2776-z

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  • DOI: https://doi.org/10.1007/s11581-018-2776-z

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