Abstract
The structural and magneto-transport properties of polycrystalline La0.85–xBixNa0.15MnO3, (x = 0, 0.05, 0.1, 0.2) manganites are reported. The polycrystalline samples were prepared using solid-state synthesis route. Rietveld refinement of X-ray data conclude the samples crystallized in a rhombohedrally distorted structure belonging to \( R\overline{3}C \) space group with no prominent structural changes upon bismuth substitution. Scanning electron microscopy has revealed improvement of microstructure from loosely bound system to densely packed array of grain. Resistivity measurements disclose metal–insulator transition for all the samples. A double metal–insulator transition is observed in samples with low concentrations (x = 0.05, 0.1). All samples have shown second-order magnetic phase transition.
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Acknowledgements
The authors are thankful to Dr. A Sundaresan (Jawaharlal Nehru Centre for Advance Scientific Research, Bengaluru) for his extended help in magnetic property measurement. The authors are also grateful to Dr. Rajeev Rawat (UGC-DAE-CSR, Indore) for his help in resistivity measurements and Dr. Mukul Gupta (UGC-DAE-CSR, Indore) for XRD measurements.
Funding
UGC-DAE Consortium for Scientific Research, Mumbai Centre, India, funded the study under the grant: UDCSR/MUM/CD/CRS-M-240/2017/1008 (L.D.M).
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Mendonca, L.D., D’Souza, A., Murari, M.S. et al. Magneto Transport Anomaly of Bismuth Substituted (La, Na) MnO3. J Supercond Nov Magn 33, 1809–1819 (2020). https://doi.org/10.1007/s10948-020-05430-4
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DOI: https://doi.org/10.1007/s10948-020-05430-4