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

摘要

? 2022 Elsevier B.V.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.