Synthesis of (CaxLa1.00−x)(Ba1.75−xLa0.25+x)Cu3Oz tetragonal superconductor by amorphous metal complex method

Relationship between the bandgap energy and photoluminescence properties of Pr3+-activated complex perovskite oxides by cation–nitrogen substitution

“…Polycrystalline Pr 3+ -activated Ca 3 Ta 3− x Mg x O 6+3 x N 3−3 x samples with a total Mg 2+ concentration ( x ) of 0.00 to 1.00 and a Pr 3+ ion concentration immobilized at Ca : Pr = 0.998 : 0.002 were prepared through the amorphous metal complex method. 21–24 This technique yields oxide precursors with better purity and homogeneity when compared to those prepared through the conventional solid-state reaction method. Various metal ions chelated by hydroxycarboxylic acids, such as citric, malic, and lactic acids, are likely to be uniformly distributed in the amorphous metal complex gel-like matter; hence, the stoichiometric ratio and the homogeneity of the solution are preserved during subsequent processing.…”