**4. Conclusion**

In summary, the pure cum composite (0.5Bi5Ti3FeO15-0.2La0.67Sr0.33MnO3- 0.3Bi2Fe4O9) is successfully prepared by using the sol–gel and its modified technique. The XRD analysis confirmed the existence of single (*A2*1*am*) and composite (*A2*1*am*, *R-3c*, and *Pbam*) phases in the pure and composite samples, respectively. The SEM analysis has confirmed the presence of homogeneous and heterogeneous microstructure of pure and composite samples. The presence of constituent elements of different phases has been detected from the EDAX spectrum. The average grain size of the pure and mixed grains of the composite sample is found to be 1.44 and 0.54 μm, respectively. The addition of magnetic LSMO and BFO phases enhances the overall magnetic properties of the composite sample. The magnetic parameters Ms and Hc in the composite are enhanced by nearly three times than the parent BTFO. This is attributed to the inherent *d-d*, *f-d*, and *f-f* exchange interaction between the Fe-Fe, Fe-Mn, and Mn-Mn ions. The frequency dependence of the dielectric constant at a fixed magnetic field demonstrates a signature of the MD effect in the pure and composite samples. This observation encourages studying the MD effect in the pure cum composite sample. The field-induced maximum strength of the MD effect is about ~0.12% at 50 kHz observed in the composite sample. This MD effect can be the combined effect of strain magnetostrictive LSMO and the inverse Dzyaloshinskii-Moriya interaction generated by the non-collinear Fe ions in the AFM BFO phase. Hence, the present composite establishes a relation between the electric and magnetic order of the constituent phases and further study can explore possibilities in MD device applications.
