Study of the structural, magnetic and dielectric properties of GdMnO3-GdMn2O5 nanocomposites via sol-gel route

Using the sol–gel route, GdMnO3-GdMn2O5 nanocomposite was synthesized at 1000 °C. For the first time, in the above room temperature conditions, Raman, magnetic, and dielectric measurements were taken of the synthesized GdMnO3-GdMn2O5 composite.The diffraction peak position resulting from a XRD pattern confirmed the formation of GdMnO3 and GdMn2O5, as well as an orthorhombic structure. Using the Raman spectra, three Raman peaks (363,475 and 608 cm−1) were detected for the synthesized composite at 350 and 400 K, indicating the formation of a bi-phase of gadolinium manganese oxide. A TEM image of the synthesized product revealed agglomerated spherical particles with a polycrystalline structure. A weak ferromagnetic behavior was found for the synthesized composite using the high-temperature vibrating sample magnetometer. From the dielectric study, it is inferred that the applied frequency and temperature play a vital role affecting the dielectric constant, dielectric loss and AC conductivity values in the synthesized composite