Enhanced magneto-electric coupling and energy storage analysis in Mn-modified lead free BiFeO3-BaTiO3 solid solutions

The present study pertains to magnetoelectric coupling and energy storage analysis of (1-x)BiFe0.95Mn0.05O3-xBaTiO(3) (BFMO-BT) with x = 0.1, 0.2, 0.3 lead free solid solutions. BFMO-BT solid solutions possessed a cubic structure as confirmed from powder XRD and the Rietveld refinement. A maximum ferroelectric polarization of 0.82 mu C/cm(2) was observed in BFMO-0.3BT. BFMO-0.3BT exhibited a maximum energy storage density (W-U) of 1.97 J/cm(3) and an energy conversion efficiency of 81.7%. Enhanced bulk magnetization was associated with the lattice defects; however, it decreased with increased BT content. For BFMO-0.3BT, temperature dependent susceptibility, dielectric measurement, and differential scanning calorimetry measurement revealed the magnetic transition temperature to be 275 degrees C, 293 degrees C, and 223 degrees C, respectively. The linear magnetoelectric coupling coefficient was measured by quantifying change in maximum polarization with respect to the applied magnetic field and was found to be 28.55 mVcm(-1) Oe for BFMO-0.3BT. Conductivity measurements of BFMO-0.3BT revealed a maximum value of activation energy, i.e., 0.21 eV at 1 kHz. Published under license by AIP Publishing.