Crystal growth of incommensurate members of 2H-hexagonal perovskite related oxides: Ba4MzPt3−zO9 (M=Co, Ni, Cu, Zn, Mg, Pt)

• Single crystals of the series Ba4A′zPt3-zO9 were grown via a molten carbonate flux.
• Ba4Pt3O9 and all substitutional variants are incommensurate, composite structures.
• All compounds have an approximate stoichiometry of Ba4A′Pt2O9.

Millimeter sized crystals of six oxides of approximate composition Ba4MzPt3-zO9 (M=Co, Ni, Cu, Zn, Mg, Pt) were grown from molten K2CO3 fluxes and found to crystallize in a 2H hexagonal perovskite-related structure type. The compositions of these incommensurate structures, which belong to the A3n+3mA′nB3m+nO9m+6n family of 2H hexagonal perovskite related oxides, were characterized by X-ray diffraction, energy dispersive spectroscopy, and magnetic susceptibility measurements. The specific synthetic considerations, crystal growth conditions, and magnetic susceptibility measurements are discussed.

SEM image and average commensurate unit cell of Ba4Pt3O9.Figure optionsDownload as PowerPoint slide