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Influence of Ba2+ Doping on Structural and Electrical Transport Properties of YMnO3 Ceramics

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Abstract

The pristine and barium (Ba2+) doped YMnO3 (Y1−xBaxMnO3; x = 0.00 and 0.05) ceramic samples were synthesized through the solid-state reaction method. The X-ray diffraction, Raman spectroscopy, and scanning electron microscopy were performed for the structural and morphological studies. The electrical transport properties were investigated using dielectric and modulus spectroscopy. The XRD patterns of the titled ceramics have shown the monophasic hexagonal structure having P63cm space group symmetry. The average crystallite size is found to decrease on partial substitution of Ba2+ cation. Raman spectroscopy was performed to observe the local disorder and variation in the modes with the introduction of dopant in the pristine ceramic. The surface morphology displays the formation of non-uniform grains in the ceramics. The dielectric spectroscopy reveals a decreasing trend in both the dielectric constant and dissipation factor with increasing frequency. It indicates the significant role played by the space charge polarization. The electrical modulus study of the ceramics was also performed to explore the electrical transport phenomenon. The present study reports the enhanced dielectric nature of doped materials.

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Acknowledgments

The authors are thankful to UGC-DAE-CSR Indore for providing measurement facilities, Dr. M. Gupta for XRD measurement, Dr. V. Sathe for Raman measurement, Dr. D.M. Phase and Mr. Ahire for SEM measurement, and Mr. Bharadwaj for dielectric measurement. We are grateful to MPCST, Bhopal (4836/CST/R&D/Phy & Engg Sc/2014) for the financial assistance. Special thanks to Ms. Mehjabeen Khan, Ms. Supriya Bisen, Mr. Bhargav Pathak, Ms. Prachi Joshi, and Ms. Pallavi Saxena for their constant support and fruitful discussion.

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  1. Materials Science Laboratory, School of Physics, Vigyan Bhawan, Devi Ahilya University, Khandwa Road, Indore, 452001, India

    Jyoti Shukla & Ashutosh Mishra

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  1. Jyoti Shukla
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Correspondence to Jyoti Shukla.

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Shukla, J., Mishra, A. Influence of Ba2+ Doping on Structural and Electrical Transport Properties of YMnO3 Ceramics. J Supercond Nov Magn 34, 451–459 (2021). https://doi.org/10.1007/s10948-020-05693-x

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