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Comparative study on multifunctional behaviour of rare earth manganites with micro and nano grain size

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Abstract

We have investigated electrical and magnetotransport properties of La0.7Sr0.3MnO3 samples with grain size in micro to nanometric regime. The structural parameters obtained by Rietveld refinement of X-ray diffraction data revealed perovskite structure with orthorhombic (Pnma) and rhombohedral (R3C) symmetry for nano and bulk samples respectively. The average particle size was 22 nm and 2 μm for the two representative samples. A metal–insulator transition and substantial increase in electrical resistivity was observed in nanomaterials. An enhanced magnetoresistance observed in nanomaterials samples, makes them more promising for advanced device applications. The magnetization study showed signature of ferromagnetic cluster behavior and higher temperature coefficient of magnetization in nanoparticle samples.

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Acknowledgments

We are thankful to M. P. Council of Science and Technology, Bhopal and University Grants Commission, New Delhi for providing financial support. We are grateful to Dr. Alok Banerjee, Dr. Rajiv Rawat and Dr. Mukul Gupta, UGC-DAE Consortium for Scientific Research, Indore for providing experimental facilities.

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Authors and Affiliations

  1. Novel Materials Research Laboratory, Department of Physics, Barkatullah University, Bhopal, 462026, India

    Hilal Ahmad Reshi, Shreeja Pillai & Vilas Shelke

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  1. Hilal Ahmad Reshi
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  2. Shreeja Pillai
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  3. Vilas Shelke
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Correspondence to Vilas Shelke.

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Reshi, H.A., Pillai, S. & Shelke, V. Comparative study on multifunctional behaviour of rare earth manganites with micro and nano grain size. J Mater Sci: Mater Electron 25, 3795–3800 (2014). https://doi.org/10.1007/s10854-014-2091-z

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  • DOI: https://doi.org/10.1007/s10854-014-2091-z

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