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Effect of heavy mixing lithium with doping of manganese on structural, EPR and dielectric spectroscopic properties of Layered Na2Ti3O7

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Abstract

Sintered ceramic samples of Na2Ti3O7 with 50 % (1.0 Molar Percentage of Li2CO3 i. e. 50 % Lithium) with different doping molar percentages MnO2 (0.0 < X<0.1) have been prepared through solid state reaction route. The microstructure, EPR, dielectric properties and ac conductivity of (NaLi)Ti3O7 with Mn [0.0 ≤ X≤0.1] have been investigated. The X-ray diffraction patterns of pure and doped layered ceramics suggest the crystals are orthorhombic in phase. The room temperature electron paramagnetic resonance spectra reveal that that for lower percentage of doping manganese ions occupies Ti 4+ site with oxidation state Mn3+, while higher percentage of manganese ions doping leads to oxidation state Mn2+ in interlayer mixed (Na Li) site. In both cases the charge compensation mechanism should operate to maintain the overall charge neutrality of the lattice. For all pure and doped layered ceramics, ferroelectric transition having high transition temperature has been identifying at 648 K. Manganese ion doping decreases dielectric loss and increases dielectric constant due to inhibition of domain wall motion. It is apparent that ionic conduction becomes difficult due to presence of more lithium ions with sodium ions in interlayer space which shrinking the wide space of interlayer channels.

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Acknowledgments

One of Authors Dr. Dharmendra Pal is thankful to Prof. Jitendra Kumar, Department of Material Science, IIT, Kanpur for providing dielectric-spectroscopic measurement and Dr. Premchand Department of Physics, IIT, Kanpur for providing Electron paramagnetic resonance facility.

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Authors and Affiliations

  1. Department of Physics, BBD National Institute of Technology and Management, BBD University Campus, Lucknow, Uttar Pradesh, 227105, India

    Dharmendra Pal, Shahanshah Haider Abdi & Ghanshyam Tripathi

  2. Department of Electrical Engineering, BBD National Institute of Technology and Management, BBD University Campus, Lucknow, Uttar Pradesh, 227105, India

    Virendra Kumar Maurya

  3. Department of Mechanical Engineering, CMJ University, Shillong, Meghalaya, India

    Kapil Sachan

  4. Departmnt of Physics, Singhania University, Pacheri Bari (Jhunjhunu), Rajasthan, India

    Sagir Ahamad Khan

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  1. Dharmendra Pal
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  2. Shahanshah Haider Abdi
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  3. Ghanshyam Tripathi
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  4. Virendra Kumar Maurya
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  5. Kapil Sachan
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Correspondence to Dharmendra Pal.

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Pal, D., Abdi, S.H., Tripathi, G. et al. Effect of heavy mixing lithium with doping of manganese on structural, EPR and dielectric spectroscopic properties of Layered Na2Ti3O7 . J Mater Sci: Mater Electron 24, 1562–1568 (2013). https://doi.org/10.1007/s10854-012-0976-2

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  • DOI: https://doi.org/10.1007/s10854-012-0976-2

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