Abstract
Structural and electrical properties of perovskite-type Y1-xSmxCryFe1-yO3 nanoparticles synthesized by the sol–gel technique have been investigated. The X-ray diffraction pattern suggests that a pure phase was obtained for all the samples. The co-doped YCrO3 samples are highly crystalline, with an average crystallite size that varies between 31 and 35 nm. The details of the crystal structure of Sm-Fe co-doped nanoparticles were investigated by Rietveld refinement using Fullprof software. The electrical transport properties of YCrO3 and doped YCrO3 samples were investigated in the temperature range 303 K to 523 K, which shows that due to doping, the dc resistivity of the co-doped YCrO3 samples increases. The effect of doping on dc and ac activation energies was estimated. Temperature dependence of the power factor suggests that ac conductivity below 425 ± 5 K (region I) can be explained by CBH (correlated barrier hopping) model, and above 425 ± 5 K (region II), NSPT (non-overlapping small polaron tunneling) model is suitable. Around 450 K, a broad peak observed in the dielectric constant vs. temperature curve indicates the relaxor ferroelectric behavior in the co-doped YCrO3 nanoparticles. The asymmetric nature of the electric modulus spectra was explained by the modified KWW function.
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Acknowledgements
The authors would like to acknowledge financial support from the SERB, Department of Science and Technology (DST), Government of India (Project No. EMR/2016/004926). The authors also like to acknowledge the financial and instrumental support of the Center of Excellence in Advanced Materials, NIT Durgapur.
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Pradipta Chakraborty: development or design of experiment, data collection, data formal analysis and interpretation, writing—original draft, writing—review and editing, and visualization. Santanu Dey: collection of some data, data formal analysis, writing—original draft, and visualization. Shovan Kumar Kundu: collection of some data, data formal analysis, writing—original draft, and visualization. Soumen Basu: conceptualization, development or design of experiment, methodology, validation, resources, writing—original draft, and supervision. National Institute of Technology Durgapur, India: project implementation.
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Chakraborty, P., Dey, S., Kundu, S.K. et al. Influence of Sm and Fe Co-doping on Structural and Electrical Features of Yttrium Chromite Nanoparticles. Braz J Phys 53, 60 (2023). https://doi.org/10.1007/s13538-023-01279-9
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DOI: https://doi.org/10.1007/s13538-023-01279-9