Rapid Synthesis and Characterization of an Oxygen-Deficient Defect Perovskite La4BaCu5O13+δ Phase

Abstract

Oxygen-deficient defect perovskite La4BaCu5O13+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 La4BaCu5O13+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 La4BaCu5O13+δ compound exhibit metallic behavior up to 15 K.