Dielectric and magnetoelectric coupling properties of Lead-free (1-x) Bi 0.9Sm 0.1FeO 3/ (x) La 0.7Sr 0.3MnO3 (x = 0, 0.05, 0.1) composites at room temperature

Abstract

Multiferroic composites (1-x) Bi 0.9Sm 0.1FeO 3/ (x) La 0.7Sr 0.3MnO3 (x = 0, 0.05, 0.1) have been synthesized and their dielectric and magnetoelectric (ME) properties were measured at room temperature. X-ray diffraction patterns show peaks corresponding to both Bi 0.9Sm 0.1FeO 3 (BSFO) and La 0.7Sr 0.3MnO3 (LSMO) phase, which indicates the successful formation of composites. The frequency responses of dielectric properties have been investigated over a wide range of frequencies at room temperature. The dielectric constant and AC conductivity of the samples enhances with increasing content of LSMO. Furthermore, the ME responses of the samples were analyzed at room temperature shows highest ME coupling value of 24.67 mV/cm Oe for composite with x = 0.05. It could generate up to 2.05 V/cm for a magnetic field of 86 Oe. The voltage generation in the composite with modulating AC field maintains a linear relation and point towards the direct application of the material in a variety of next generation low power consuming devices working at room temperature.