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Studies of structural, dielectric and electrical characteristics of YBaCuFeO5 ceramics

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Abstract

In the present work, we have mainly carried out comprehensive studies of structural, microstructure, dielectric, electrical (impedance, modulus, conductivity, leakage current) characteristics of the Fe-modified Y2BaCuO5 of a chemical composition of YBaCuFeO5, fabricated by a. cost-effective ceramic fabrication technique. Room-temperature X-ray diffraction studies reveal that it crystallizes in tetragonal crystal system. SEM and EDAX of the sample provide the micro structural details of the ceramic sample with homogeneous grain and grain-boundary distribution. Dielectric and impedance characteristics have been studied over a frequency range of (1 kHz–1 MHz). Maxwell–Wagner polarization effect observed from the frequency response of polarization study is also evident from the grain and grain-boundary resistances obtained from Nyquist plot. Electric modulus studies and scaling behavior with details of the relaxation time of the sample has been discussed. Leakage current behavior has also been discussed and the type of mechanism responsible for conduction is indicated to be space-charge limited conduction mechanism. Owing to the increasing demand for miniaturization of electronic components and the versatility of applications; design and fabrication of new dielectric ceramics is of great interest to us. Major applications include sensors, actuators, transducers and capacitors. These applications require the dielectric ceramics to have high value of dielectric constant, low dielectric loss, high Tc value (in case of ferroelectric sample) etc. So far detailed analysis of electrical transport behavior, impedance characteristics, I–V (current–voltage) characteristics and leakage current behavior within a temperature range from 25 °C -400 °C for YBaCuFeO5 has not been carried out. High-K dielectric materials finds major applications in central processing units, dynamic random access memories, multilayered ceramic capacitors that are the building blocks of printed circuit boards. In such a scenario exploring the dielectric, impedance and electrical behavior of the synthesized ceramic sample YBaCuFeO5 at room and higher temperature can provide significant insights which can help broaden the amount of work carried out for this material. In our synthesized sample we have observed a dielectric constant of 395 at 50 kHz at room temperature and high value of 8514 is observed at a higher peak around 231 °C for the same frequency.

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The data sets supporting the results reported in the manuscript can be available from the corresponding author on reasonable request.

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Acknowledgements

One of the authors Rashmi Rekha Sahoo would like to acknowledge DST, INSPIRE for the financial support.

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Authors and Affiliations

  1. Multiferroic Laboratory, Department of Physics, Siksha ‘O’ Anusandhan (Deemed to be) University, Bhubaneswar, Odisha, 751030, India

    Rashmi Rekha Sahoo & R. N. P. Choudhary

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  1. Rashmi Rekha Sahoo
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  2. R. N. P. Choudhary
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection was done by RRS and analysis were performed by RRS and RNPC. The first draft of the manuscript was written by RRS and RNPC all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Rashmi Rekha Sahoo.

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Sahoo, R.R., Choudhary, R.N.P. Studies of structural, dielectric and electrical characteristics of YBaCuFeO5 ceramics. J Mater Sci: Mater Electron 33, 15704–15718 (2022). https://doi.org/10.1007/s10854-022-08473-6

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  • DOI: https://doi.org/10.1007/s10854-022-08473-6

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