LaSrCuAlO5: A new oxygen-deficient perovskite structure

J. B. Wiley, M. Sabat, S. J. Hwu, K. R. Poeppelmeier, A. Reller, T. Williams

Research output: Contribution to journalArticleResearchpeer-review

24 Citations (Scopus)


A new oxygen-deficient perovskite, LaSrCuAlO5, has been prepared. The compound crystallizes in the orthorhombic crystal system with the space group Pbcm. The unit cell dimensions (Z = 4) are a = 7.9219(6), b = 11.020(1), and c = 5.4235(4) Å. The compound is a layered copper oxide with a structure related to that of the mineral brownmillerite. Important structural features include buckled copper oxygen planes and nonmagnetic, insulating aluminum-oxygen chains that alternate with the copper oxygen planes along the 7.9-Å axis. Resistivity measurements show that LaSrCuAlO5 is a semiconductor (ρ{variant}300 K = 0.065 Ω cm) and magnetic susceptibility measurements demonstrate that the compound is paramagnetic down to 4 K.

Original languageEnglish
Pages (from-to)250-260
Number of pages11
JournalJournal of Solid State Chemistry
Issue number1
Publication statusPublished - 1 Jan 1990
Externally publishedYes

Cite this