ABSTRACT This study investigates the influence of nickel ferrite addition and the two‐step sintering method on the structural, dielectric, electronic, multiferroic, and magnetodielectric properties of 0.94BaTiO 3 (BTO)–0.06NiFe 2 O 4 (NFO) composites. X‐ray diffraction (XRD) assessments exhibited a diminution of the BTO's tetragonality factor ( c / a ) due to the addition of NFO into the matrix. The nature of the chemical bonding among the atoms was ascertained using electron density analysis. The dielectric and ferroelectric properties were examined, revealing that the BTN 2 (two‐step sintering: 1400°C for 1 min followed by 1300°C for 20 h) composite, with the highest relative density (97%), acquired supreme parameters among all samples (dielectric constant ∼1784, dielectric loss factor ∼0.09, saturation polarization ∼13.4 µC/cm 2 , and remnant polarization ∼11.2 µC/cm 2 ). Moreover, the electronic structure of the ceramics indicated a reduction of the BTO's band gap resulting from the decrease in c / a . Magnetic measurements showed a consistent range of saturation magnetization (∼2.4 emu/g) for all ceramics, while the coercivity ( H c ) dropped from ∼148 to ∼119 Oe by increasing the relative density. Finally, the magnetodielectric coefficient of the multiferroic composites was calculated, with the BTN 2 sample achieving the highest value (2.3%) at 7 kOe.
Soleimani et al. (Mon,) studied this question.