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Structural and electrical investigation of rare-earth doped lead-free SrBi4Ti4O15 ceramics

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Abstract

Lead-free ferroelectric ceramics Sr(1−2x)NaxNdxBi4Ti4O15 are synthesized by solid state method using high energy ball milling. X-Ray diffraction and X-Ray Photoelectron Spectroscopy studies confirmed the formation of single phase SBT ceramics without any major structural distortion due to Nd doping. The electrical properties have been found to be strongly dependent on the dopant concentration. A monotonic increase in transition temperature was observed from 568 to 622 °C. The dielectric constant as well as dielectric loss values got decreased after Nd doping which are correlated with origin of ferroelectric microdomains during the synthesis procedure. Using impedance spectra analysis and fitting the data into equivalent circuit, the grain and grain boundary effect has been explored. Enhancement in piezoelectric properties has been observed in the modified systems. 2Pr value has reached to a maximum of 9.2 μC/cm2 for sample with x = 4.

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Acknowledgements

Authors are thankful to Dr. Hari Sankar Mohanty, GIET University for impedance measurements and Dr. M. Buchi Suresh, Scientist-E, ARCI, Hyderbad for dielectric measurements, Dr. Nilakantha Tripathy, Model Degree College, Nabarangpur and Dr. P. Sarah, VJIT, Hyderabad for their valuable discussion and suggestion in preparation of manuscript.

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Authors and Affiliations

  1. Department of Physics, Jawaharlal Nehru Technological University, Kukatpally, Hyderabad, Telangana, 500085, India

    G. Rajashekhar & T. Sreekanth

  2. Department of Physics, Vardhaman College of Engineering, Shamshabad, Hyderabad, Telangana, 501218, India

    G. Rajashekhar

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  1. G. Rajashekhar
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  2. T. Sreekanth
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Correspondence to G. Rajashekhar.

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Rajashekhar, G., Sreekanth, T. Structural and electrical investigation of rare-earth doped lead-free SrBi4Ti4O15 ceramics. Indian J Phys (2024). https://doi.org/10.1007/s12648-024-03099-2

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