EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. .

D. W. Murphy; S. A. Sunshine; P. K. Gallagher; H. M. O'Bryan; Robert Joseph Cava; B. Batlogg; R. B. van Dover; L. F. Schneemeyer; S. M. Zahurak

EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. .

D. W. Murphy, S. A. Sunshine, P. K. Gallagher, H. M. O'Bryan, Robert Joseph Cava, B. Batlogg, R. B. van Dover, L. F. Schneemeyer, S. M. Zahurak

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English (US)
Title of host publication	ACS Symposium Series
Editors	David L. Nelson, M.Stanley Whittingham, Thomas F. George
Publisher	ACS
Pages	181-191
Number of pages	11
ISBN (Print)	084121431X
State	Published - Dec 1 1987
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

Cite this

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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, {Robert Joseph} and B. Batlogg and {van Dover}, {R. B.} and Schneemeyer, {L. F.} and Zahurak, {S. M.}",

year = "1987",

month = dec,

day = "1",

language = "English (US)",

isbn = "084121431X",

pages = "181--191",

editor = "Nelson, {David L.} and M.Stanley Whittingham and George, {Thomas F.}",

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AU - Murphy, D. W.

AU - Sunshine, S. A.

AU - Gallagher, P. K.

AU - O'Bryan, H. M.

AU - Cava, Robert Joseph

AU - Batlogg, B.

AU - van Dover, R. B.

AU - Schneemeyer, L. F.

AU - Zahurak, S. M.

PY - 1987/12/1

Y1 - 1987/12/1

N2 - 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.

AB - 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.

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AN - SCOPUS:0023569548

SN - 084121431X

SP - 181

EP - 191

BT - ACS Symposium Series

A2 - Nelson, David L.

A2 - Whittingham, M.Stanley

A2 - George, Thomas F.

PB - ACS

ER -

EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. .

Abstract

All Science Journal Classification (ASJC) codes

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