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Phase Stabilization of Fe Substituted SmMn2O5: SmFeMnO5

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Abstract

The SmFeMnO5 phase has been stabilized using mechanical milling and respective high temperature sintering of the oxides in stoichiometric ratio. The crystal structure is studied by Rietveld analysis of the X-ray diffraction data obtained at room temperature. Analysis is done by considering Fe3+ ions at the Mn3+ sites in the parent SmMn2O5 structure and the results indicate the formation of SmFeMnO5. A change in bond angles and bond distances is obtained due to the reduction in the percentage of Mn3+ Jahn–Teller ions. Isothermal magnetization study at room temperature reveal ferromagnetic nature of the material with a saturation magnetization of 6.57 emu/g. A linear decrease in resistivity with temperature is obtained and the activation energy is calculated from Arrhenius plot. Impedance studies show decrease in dielectric constant values with frequency and temperature due to Fe substitution in the SmMn2O5 structure.

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Acknowledgments

KSK acknowledges DRDO, India for support through fellowship. NAD acknowledges Sampathu for his kind help.

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  1. K. Saravana Kumar

    Present address: Department of Physics, SRM University, Ramapuram Campus, Chennai, 600 089, India

Authors and Affiliations

  1. Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai, 600 025, India

    K. Saravana Kumar, N. Aparnadevi, A. Muthukumaran & C. Venkateswaran

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  1. K. Saravana Kumar
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  2. N. Aparnadevi
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Correspondence to K. Saravana Kumar.

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Saravana Kumar, K., Aparnadevi, N., Muthukumaran, A. et al. Phase Stabilization of Fe Substituted SmMn2O5: SmFeMnO5 . Trans Indian Inst Met 68, 693–698 (2015). https://doi.org/10.1007/s12666-014-0501-9

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