Comprehensive study of double perovskite SrLaFeTiO6: structural, dielectric, magnetic and ferroelectric properties

In this article, we present a study on the structural, dielectric, magnetic and ferroelectric properties of polycrystalline ceramic SrLaFeTiO6 double perovskite synthesized by high temperature solid–state reaction technique. The crystalline composition of the sample was analyzed through various techniques, including X–Ray diffraction, electron density maps and scanning electron microscopy. The results of X–Ray diffraction pattern, analyzed using Rietveld refinement, confirm the formation of orthorhombic crystal structure without the presence of any impurities in the prepared sample. The electron density contour maps indicate spatial symmetry in the proposed crystal structure. The microstructure of the sample is found to be dense, as evidenced by SEM micrographs. Dielectric studies reveal a dispersion behavior at low temperature. Impedance graphs emphasize grain/grain boundary effects and highlight the negative temperature coefficient of resistance for the material. Additionally, modulus graphs exhibit non–Debye type behavior. Magnetization measurements show an unusual rise in coercivity with temperature, suggesting the magnetoelectric coupling. The existence of weak ferromagnetism and spin glass behavior, caused by magnetic frustration is explained through ZFC–FC curves and M–H loops. Ferroelectric response of the sample is revealed by the emergence of a P–E hysteresis loop.