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Yttrium (1 mol %) -doped 0.49BiFeO3-0.20Pb(Mg1/3Nb2/3)O3-0.31PbTiO3 ceramic at the morphotropic phase boundary was synthesized by a solid-state reaction via columbite precursor technique. X-ray diffraction (XRD) and FESEM analysis confirmed a perovskite phase in the P1m1 space group with a homogeneous microstructure sintered at 920 °C. Rietveld refinement yield lattice parameters a = 3.95984 Å, b = 3.93828 Å, c = 4.04466 Å, α = 90.000°, β = 89.970°, γ = 90.000°. Studies of dielectric permittivity and ferroelectric hysteresis at room temperature shows Y doping impact, exhibiting low dielectric loss and a saturated hysteresis loop. The synthesized sample remains fatigue-free over 104 cycles, with a high value of converse piezoelectric coefficient of d33* ̴ 723 pm/V. Weak ferromagnetism is observed in the magnetic hysteresis loop (M-H) at room temperature, suggesting potential applications in ferroelectric-based technologies. [ABSTRACT FROM AUTHOR]

Pure and Mn-doped 0.49BiFeO3–0.20Pb(Mg1/3Nb2/3)O3–0.31PbTiO3 (BF–PMN–PT) ceramics at morphotropic phase boundary (MPB) have been prepared by solid state reaction method. A systematic investigation of its microstructure and electrical properties was conducted. Powder X-ray diffraction (XRD) and Field emission scanning electron microscope (FESEM) showed the formation of pure perovskite phase with homogeneous microstructure having average grain size of 2.48 µm at optimum temperature 920 °C. As compared to the pure BF–PMN–PT ceramic, enhanced dielectric constant value (~ 800) was observed for Mn-doped sample at room temperature. Polarization vs. electric field (P–E) hysteresis curves exhibits improved ferroelectric properties (Pr = 97.65 C/cm2 at coercive field Ec = − 17.08 kV/cm) after doping and showed a fatigue free nature over 104 switching cycles. The displacement voltage (D–V) curve showed a high value of the piezoelectric coefficient d33* = 786 pm/V after Mn doping. The magnetic hysteresis loop (M–H) curve showed a weak ferromagnetic nature with coercive field (Hc = 54.19 Oe) and remanent magnetization (Mr = 0.0087 emu/g) of the sample. Therefore, Mn-doped BF–PMN–PT ceramic can be a promising candidate for applications in the electronic ceramic industries. [ABSTRACT FROM AUTHOR]