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Effect of MnO2 on structural and electrical characteristics of Ba0.5Sr0.5TiO3

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Abstract

As the variable dielectric constant, loss and some electric characteristics over the frequency and temperature band of operation make a material unsuitable for some devices, an attempt has been made through this work to obtain frequency–temperature independence of said parameters by suitable addition of metal oxide (MnO2) in lead-free ferroelectric (BaSr) TiO3 in the band of interest. The doping concentration of the oxide in Ba0.5Sr0.5TiO3 has been optimized for the purpose. The doping of manganese oxide reduces the loss by compensating the oxygen vacancies and the structural defects. With variable doping concentration of MnO2 dielectric loss is brought down to an acceptable limit (<10−3). Impedance and modulus spectroscopy of the prepared materials provide an insight into the electrical processes involved in it. The AC/DC conductivity analysis provides loss-conductivity spectrum for device utilization.

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Acknowledgments

Authors thankfully acknowledge the help provided by Prof. K. L. Yadav of IIT Roorkee for the XRD measurement and IIT Kharagpur for SEM facility. Authors are extremely thankful to Sri Chakradhar Behera (SRF) for his valuable suggestions.

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Authors and Affiliations

  1. Scientist, Integrated Test Range, Defence Research and Development Organization, Chandipur, Odisha, India

    Niladri Roy

  2. Department of Physics, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan University, Jagmohan Nagar, Jagamara, Bhubaneswar, 751030, India

    R. N. P. Choudhury

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  1. Niladri Roy
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Correspondence to Niladri Roy.

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Roy, N., Choudhury, R.N.P. Effect of MnO2 on structural and electrical characteristics of Ba0.5Sr0.5TiO3 . J Mater Sci: Mater Electron 27, 947–955 (2016). https://doi.org/10.1007/s10854-015-3838-x

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