Abstract
It's indeed critical to improve our understanding of how functional materials work in order to design the next generation of materials in their domains. We chose LuFeO3 and Lu(YFe)O-3 to study the electronic structural and spectroscopic properties using X-ray photoelectron spectroscopy and Mossbauer spectra to accomplish this. LuFeO3 and Lu0.2Y0.8FeO3 were prepared by the solution combustion method using carbamide and glucose as fuel. As-synthesized samples sintered at 1250 degrees C to get single phase. X-ray diffraction patterns of LuFeO3 nanoparticles confirm the orthorhombic structure and Lu0.2Y0.8FeO3 nanoparticles confirm the major orthorhombic structure and minor hexagonal structure. Crystallite size decreases after the substitution of Y3+ on LuFeO3. X-ray photoelectron spectra were excited with a monochromatized AlK _-line radiation. Absolute resolved energy interval was 0.6 eV, which was determined with the Ag3d(5/2) line. The diameter of the X-ray spot on a sample was 500 mm; it was small enough to study the samples obtained. The sample of the composition Lu0.2Y0.8Fe O-3 contains approximately 10 times less LuFeO3. The spectra are split into components that correspond to the valence locations of Y3d, Fe3d, and Lu 4f states in yttrium, iron, and lutetium, respectively. It can be seen that the addition of yttrium does not strongly displace the valence band components related to the densities of Y3d, Fe3d, and Lu 4f states in the Lu0.2Y0.8FeO3 sample as compared to nanoparticles of the LuFeO3 composition. Fe2p(3/2,1/2)-X-ray photoelectron spectra in both samples have similar energies. In addition, both spectra have charge transfer satellites located at about 718.2 eV between the Fe2p(3/2) and Fe2p(1/2) peaks. Mossbauer spectra of LuFeO3 and Lu0.2Y0.8FeO3 were collected in the temperature range of 13-700 K. At 700 K, the spectra of both samples are paramagnetic doublets with similar parameters. At the lowest temperature (14 K), the spectra of both samples are magnetically split sextets. The isomer shift values of the sextets and doublets are typical for Fe3+ ions in oxygen octahedron.