Dielectric modulus and magnetocapacitance behavior of Bi_3.7Sm_0.3Ti_2.7Fe_0.3O₁₂ multiferroic

This communication presents the dielectric and magnetodielectric studies of Bi_3.7Sm_0.3Ti_2.7Fe_0.3O₁₂ ceramic samples synthesized by a conventional solid state reaction method. X-ray diffraction (XRD) patterns reveal the formation of single phase orthorhombic structure. Dielectric measurements have shown anomalous behavior around 150 °C. Dielectric modulus analysis confirms the non-Debye type relaxation behavior at higher temperature. Room temperature weak ferromagnetism has been observed for Sm/Fe modified bismuth titanate ceramic with 2M_r value of 5.4×10⁻³ emu/g. Magnetodielectric measurement shows the variation in dielectric constant value with applied magnetic field of 5 T, which confirms the magnetodielectric coupling in the system. The present results suggest a new material for room temperature multiferroic applications