@inproceedings{5ff8a37f782a45d8b6ac1bb85e6ab0e5,
title = "EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. .",
abstract = "Results of a series of studies on the oxygen stoichiometry in Ba//2YCu//3O//x, 6. 0 less than equivalent to x less than equivalent to 7. 0, are reported. The structure at x equals 7 contains layers of corner-shared, square pyramidal copper and chains of square planar copper. Oxygen is removed from the chains leaving two-fold coordinate copper at x equals 6. Superconductivity is optimal for x approximately equals 7 and for x equals 6 the material is a semiconductor. A valence description ascribes Cu** plus **2 to the Cu in the layers for all x with the Cu in the chains going from Cu** plus **3 at x equals 7 to Cu** plus **1 at x equals 6. A model for twinning based on oxygen defects similar to those in Ba//2YCu//3O//6 is discussed.",
author = "Murphy, \{D. W.\} and Sunshine, \{S. A.\} and Gallagher, \{P. K.\} and O'Bryan, \{H. M.\} and Cava, \{R. J.\} and B. Batlogg and \{van Dover\}, \{R. B.\} and Zahurak, \{S. M.\} and Schneemeyer, \{L. F.\}",
year = "1987",
language = "English",
isbn = "084121431X",
series = "ACS Symposium Series",
publisher = "ACS",
pages = "181--191",
editor = "Nelson, \{David L.\} and M.Stanley Whittingham and George, \{Thomas F.\}",
booktitle = "ACS Symposium Series",
}