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Improvement in the structural, dielectric, and magnetic properties of CFO-doped KNNS-BKT ceramics

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Abstract

Multiferroics/Magnetoelectric materials have received global interest due to the exhibiting ordered coupling between magnetic and ferroelectric phases and simultaneously showing a large magnetoelectric coupling coefficient. In the present work, CoFe2O4-doped 0.97(K0.4Na0.6Nb0.96Sb0.04O3)–0.03(Bi0.5K0.5TiO3) ceramics were synthesized by a modified two-step solid-state reaction method. Moreover, the correlation between structural, dielectric, and magnetic properties was investigated in detail. X-ray diffraction, along with Rietveld refinement, shows the co-existence of rhombohedral (Amm2), tetragonal (P4mm), and cubic (Fd3m) phases in the CoFe2O4-doped ceramics. The scanning electron microscope shows that all the ceramics have rod-like and spherical cuboid-shaped grain morphology. Dielectric study indicates an increase in Curie temperature (TC) with the rise in CoFe2O4 content. These composites have a well-saturated hysteresis loop, confirming the ferromagnetic behavior of composites at room temperature. The composite with x = 0.15 shows a maximum ME coupling coefficient of 21.88 mV/(cm.Oe).

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Authors and Affiliations

  1. Department of Physics, ACBS, Eternal University, Sirmour, HP, 173101, India

    Priyanka Thakur, Kritika Gupta, Prashant Thakur & Madan Lal

  2. Department of Physics, Central University of Kerala, Kasaragod, Kerala, 671314, India

    Ajith S. Kumar & Vivek Sudarsanan

  3. Department of Physics, Kristu Jayanti College, Bengaluru, 560077, India

    Ajith S. Kumar

  4. Applied Sciences Department, National Institute of Technical Teachers Training and Research, Chandigarh, 160019, India

    Pankaj Sharma

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  1. Priyanka Thakur
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Contributions

PT: writing-original draft. KG: methodology, writing-original draft. PT: methodology, validation, ASK: resources. VS: resources. PS: writing-review & editing. ML: conceptualization, data curation, supervision, Writing-review & editing.

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Correspondence to Madan Lal.

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Thakur, P., Gupta, K., Thakur, P. et al. Improvement in the structural, dielectric, and magnetic properties of CFO-doped KNNS-BKT ceramics. J Mater Sci: Mater Electron 34, 311 (2023). https://doi.org/10.1007/s10854-022-09782-6

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