Rapid Synthesis and Characterization of an Oxygen-Deficient Defect Perovskite La 4 BaCu 5 O 13 + δ Phase

Abstract

Oxygen-deficient defect perovskite La 4 BaCu 5 O 13 + δ phase has been synthesized by the nitrate-citrate gel combustion method at 950 ° C for 2 h. Structural parameters were refined by the Rietveld refinement method using room-temperature powder XRD data. The La 4 BaCu 5 O 13 + δ crystallizes in the tetragonal structure with space group P4/m (no. 83) and having the lattice parameters a = 8.6508 (1) Å and c = 3.8606 (2) Å, respectively. Oxygen content was determined by the iodometric titration. Low-temperature resistivity result reveals that La 4 BaCu 5 O 13 + δ compound exhibit metallic behavior up to 15 K.