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Dielectric, Impedance, Magnetic and Magnetocapacitance Investigations in ferrite–manganite nanocomposites for Hydroelectric Cell applications

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Abstract

In this work, nanoparticles of CoFe2O4 and La0.67Sr0.33MnO3 and nanocomposites (1 − x)CoFe2O4 − (x)La0.67Sr0.33MnO3 (for x = 0.10, 0.20, 0.30) have been made through sol–gel route and solid-state route, respectively. The structural analysis via X-ray diffraction (XRD) displays formation of spinel CoFe2O4 (CFO) having crystallite size 35 nm and rhombohedral La0.67Sr0.33MnO3 (LSMO) having crystallite size 15 nm. Field emission scanning electron microscope and energy-dispersive X-ray analysis (FESEM-EDAX) shows the particle size of 51.35 nm and 24.77 nm for CFO and LSMO, respectively. The particle size and crystallite size decreased in CFO-LSMO nanocomposites with increase in LSMO content. The dielectric measurements display strong Maxwell–Wagner polarization and display strong composition dependence attributed to homogenous distribution of LSMO as well as non-pinning of domain wall of CFO. The impedance spectroscopy displayed thermally activated conduction mechanism. The magnetocapacitance measurements displayed improvement in magnetoelectricity with LSMO content. The hydroelectric cell of CFO-LSMO nanocomposites exhibited a strong correlation between the content of LSMO and the efficiency of the cell. The 0.7LSMO-0.3CFO composite exhibited improved performance in hydroelectric cell as can be observed from drastic difference in impedance from 8×104 to 3×103 Hz. These improvements in the structural, electrical, magnetocapacitance and hydroelectric cell performance with LSMO in the prepared composites suggest their potential use in magnetoelectric and hydroelectric devices.

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Funding

This work is funded by Research Scheme no. 03(1427)/18/EMR-II, CSIR, New Delhi, India, and supported by UGC-DAE CSR-Indore, India, for characterization facilities.

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Authors and Affiliations

  1. Functional Materials Research Laboratory, Department of Physics, ARSD College, University of Delhi, Delhi, 110021, India

    Chitralekha & S. Shankar

  2. Department of Physics, Multanimal Modi College, Ch. Charan Singh University, Meerut, UP, India

    Chitralekha & A. P. Singh

  3. Department of Applied Physics, Amity Institute of Applied Sciences, Amity University, Noida, UP, India

    S. Gaurav

  4. CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110012, India

    R. K. Kotnala

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  1. Chitralekha
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  2. S. Gaurav
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  3. R. K. Kotnala
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  4. S. Shankar
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  5. A. P. Singh
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Contributions

C.C., formal analysis, investigation and writing, original draft. S.S., conceptualization; writing, review and editing; assessment; and supervision. S.G., writing, review and editing. R.K.K., writing, review and editing. A.P.S., conceptualization; writing, review and editing; assessment; and supervision.

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Correspondence to S. Shankar or A. P. Singh.

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Chitralekha, Gaurav, S., Kotnala, R.K. et al. Dielectric, Impedance, Magnetic and Magnetocapacitance Investigations in ferrite–manganite nanocomposites for Hydroelectric Cell applications. emergent mater. (2024). https://doi.org/10.1007/s42247-023-00621-w

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