Synthesis of Ca0.25Cu0.75TiO3 and infrared characterization of role played by copper

摘要: Abstract Ca0.25Cu0.75TiO3 compounds with a perovskite-type structure have been reported to display the double advantage for capacitance applications show high dielectric constant and little dependence on temperature near room temperature. Powders prepared by using an organic gel-assisted citrate process. The infrared reflectivity spectra obtained sintered ceramic discs are very different from those of simple cubic perovskites. Copper indeed is expected form hybridized bonds oxygen, contrary calcium. As result, instead remaining equidistant calcium or copper as in perovskite, oxygen forms shorter inducing strong distortion octahedra. Spectra Kramers–Kronig transformed fitted factorized function. Results that origin phononic but rather due relaxational process characteristic frequency gigahertz range. Thin films grown PLD (100) SrTiO3 substrate preferential orientation.