Abstract
Multiferroic composites having composition (1 − x) BaTiO3–(x) BaFe12O19 (x = 0.50, 0.60, 0.70) were synthesized by the conventional solid-state reaction method. These composites constitute BaTiO3 as the ferroelectric phase and BaFe12O19 as the ferromagnetic phase. X-ray diffraction (XRD) was used to analyze the formation of crystal structure and phase purity. The formation of individual phases took place without evolving any chemical reaction in all the prepared samples, which evidences the good synthesis of composite ceramics. The presence of characteristic symmetry consisting of tetragonal (P4mm) and hexagonal (P63/mmc) was confirmed by the Rietveld refinement of XRD data. The effect of alternate concentration variation of the component ceramics has been analyzed over the dielectric, electric, and magnetic properties of the composites prepared. The dielectric constant (ε') and dielectric loss (tanδ) were recorded in the frequency and temperature domain and these have been observed to follow Maxwell Wagner’s dispersive behaviour. The dielectric relaxation and conduction mechanism were analyzed with the help of complex impedance spectroscopy (CIS). In Nyquist plots, two semi-circles, whose centres lie below the real axis, were observed for all the prepared samples. Magnetization (M) versus magnetic field (H) loops, recorded at room temperature shows, gradual increase with the increase in ferrite content. These hysteresis loops were fitted by the law of approach to saturation (LAS) and values of various magnetic parameters were evaluated. The gradual enhancement in the values of magnetic parameters may be attributed to an increase in the ferromagnetic phase component.
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Acknowledgements
The authors are highly thankful to DST, New Delhi for providing the XRD facility under the FIST Scheme to the department (SR/FST/PSI-089/2005). Anand Kumari is thankful to CSIR for the award of junior research fellowship (09/752/(0063)/2016-EMR-I). Ashish Agarwal and Sujata Sanghi are also thankful to DST, New Delhi for providing funds under the PURSE program vide grant number SR/PURSE Phase 2/40(G).
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AK was involved in the investigation, data curation, conceptualization and writing original draft, OS contributed to software visualization and validation, EA contributed to formal analysis and data curation, MC contributed to methodology and resources, VV contributed to resources and formal analysis, SS contributed in writing—review and editing, conceptualization and funding acquisition, AA contributed in supervision, project administration, writing original draft and validation.
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Kumari, A., Singh, O., Arya, E. et al. Crystal structure, dielectric and magnetic properties of (1 − x)BaTiO3-(x)BaFe12O19 (x = 0.50, 0.60, 0.70) multiferroic composites. Appl. Phys. A 129, 334 (2023). https://doi.org/10.1007/s00339-023-06596-z
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DOI: https://doi.org/10.1007/s00339-023-06596-z