Sonocatalysis of the magnetic recyclable layered perovskite oxides

Protonic and electronic conductivity of the layered perovskite oxides HCa2Nb3O10 and Ca4Nb6O19

The structural and electrical properties of the DioneJacobson series layer perovskite HCa2Nb3O10 were investigated. Within the intermediate temperature range (200e475 C), the compound undergoes topochemical dehydration to Ca4Nb6O19 and, under reducing atmospheres, partial reduction of Nb(V) to Nb(IV). These changes occur upon heating and are not reversed on cooling. Analysis of impedance data s...

Photocatalytic activity of layered perovskite-like oxides in practically valuable chemical reactions

Orbital physics in the perovskite Ti oxides

Titanate compounds have been recognized as key materials for understanding the coupling of magnetism and orbitals in strongly correlated electron systems. In the perovskite Ti oxide RTiO3 (where R represents the trivalent rare-earth ions), which is a typical Mott–Hubbard insulator, the Ti t2g orbitals and spins in the 3d1 state couple each other through the strong electron correlations, resulti...

Photoemission for layered oxides

The study of electronic structure of complex systems has been intensely prompted since the cuprate has been considered as potential breakthrough in high Tc superconductivity. Angle-resolved photoemission spectroscopy (ARPES) is one of the most direct methods of studying the electronic structure of solids. By measuring the kinetic energy and angular distribution of the electrons photoemitted fro...

Auto - combustion synthesis of perovskite - type oxides

A versatile one-pot auto-combustion method for the synthesis of powders of iron-doped strontium titanate, SrTi1-xFexO3-δ, has been developed. The synthesis is optimised by the combined use of EDTA and citric acid as chelating agents, and an appropriate balance between fuel and oxidising elements in the reaction mixture. The method produces immediately an almost phase-pure perovskite oxide powde...