Structure and Magnetic Properties of a Nanosized Iron-Doped Bismuth Titanate Pyrochlore.

The nanosized (50-70 nm) pyrochlore BiFeTiO was prepared by a coprecipitation technique. Characterization of BiFeTiO was carried out by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Raman spectroscopy, Mössbauer spectroscopy, and magnetic susceptibility measurements. The study of Fe doping in BiTiO was performed by means of density functional theory (DFT) calculations.

Structural, Optical, Luminescence, and Electrical Properties of Eu/Li- and Eu/Na-Codoped Magnesium Bismuth Niobate Pyrochlores.

Eu-doped bismuth-based BiMgNbO ( = Li and Na) pyrochlores were synthesized by the organic-inorganic precursor combustion technique. The study examined the effect of rare earth element Eu doping on the structural, dielectric, optical, and luminescence properties of synthesized materials. The analysis showed that the substitution of Bi cations with Eu leads to dielectric permittivity decreasing due to the structural distortion for the Eu-concentrated compositions and low polarizability of Eu.

Photocatalytic Properties of BiTiO ( = 0, 0.5) Pyrochlores: Hybrid DFT Calculations and Experimental Study.

The photocatalytic properties of BiTiO ( = 0, 0.5) pyrochlores are examined via calculations and experiments. A coprecipitation method is applied for the synthesis of nanopowder pyrochlores.

Ab Initio and Experimental Insights on Structural, Electronic, Optical, and Magnetic Properties of Cr-Doped BiTiO.

Combined ab initio and experimental study of Cr doping into bismuth titanate pyrochlore was carried out for the first time. Accurate first-principles density functional theory calculations were performed considering a Hubbard correction (DFT+U) to account for on-site Coulomb interactions of the Cr 3d states. The possibility to synthesize a novel pyrochlore-type compound with a high dopant content BiCrTiO (Bi site doping) in a fine powder state was shown via coprecipitation method, while the single-phase BiTiCrO (Ti site doping) could not be obtained.