Abstract
The research being conducted presents a glance into the effects of Gd substitution on the structural, magnetic, and dielectric properties of Bismuth ferrite by fabricating the series as Bi1−xGdxFeO3 (x = 0.0, 0.05, 0.10, 0.15, and 0.20) synthesized via Pechini’s modified sol–gel route. X-Ray Diffraction (XRD) data and Rietveld refinement of the XRD data revealed the phase purity and nanocrystalline nature of synthesized Nanoparticles (NPs). The substitution of Gd3+ ions lead to the structural distortion in BiFeO3 (BFO) NPs which is confirmed by the XRD Rietveld refinement. Fourier Transform Infrared Spectroscopy (FTIR) analysis confirms the characteristic metal oxide bonds of FeO6 octahedra which accommodates the Gd3+ ions in BFO samples. The ferromagnetic ordering parameters decreased with increasing Gd3+ ions concentration in BFO NPs but observed the highest magnetization of 0.815 emu/g at x = 0.15 due to dominating ferromagnetic behavior, this phenomenon is well understood with Arrott’s plots. Electron Paramagnetic Resonance (EPR) spectroscopy was performed to investigate the electronic and magnetic interactions in the samples, the analysis revealed the presence of distinct resonance peaks associated with Gd3+ ions substitution, providing insights into the local magnetic properties, and the observed ferromagnetic behavior of the samples is also endorsed by the EPR analysis. The microstructural analysis was conducted by the use of Field Emission Scanning Electron Microscopy (FESEM) in conjunction with Energy-Dispersive X-ray Spectroscopy (EDS) which provided insights into the surface morphology and elemental composition of the examined samples. The FESEM and EDS elemental overlay images displayed well-defined grain boundaries and a homogeneous distribution of Gd3+ ions throughout the matrix. Dielectric spectroscopy was employed to investigate the dielectric properties of the synthesized NPs. The dielectric constant, loss tangent, and dielectric loss of the samples with Gd substitution were measured over multiple frequencies to observe the impact of Gd substitution on the dielectric properties. These findings contribute to the understanding of the multifunctional properties of perovskite materials and their possible applications in potential fields.
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Authors would like to express the sincere gratitude to Ms. Sweety Dahiya for her invaluable assistance in the analysis and corrections of this research article.
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SS contributed to conceptualization, methodology, and roles/writing of the original draft. AK contributed to supervision, conceptualization, methodology, and roles/writing, reviewing, and editing of the manuscript. OPT contributed to supervision, conceptualization, methodology, and roles/writing, reviewing, and editing of the manuscript.
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Sharma, S., Kumar, A. & Thakur, O.P. Investigations on structural, magnetic, and dielectric properties of Gd-substituted perovskite BiFeO3 multiferroics. J Mater Sci: Mater Electron 34, 2050 (2023). https://doi.org/10.1007/s10854-023-11464-w
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DOI: https://doi.org/10.1007/s10854-023-11464-w