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, R. J. Cava, B. Batlogg, R. B. van Dover, Lynn Schneemeyer, S. M. Zahurak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

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 languageEnglish
Title of host publicationACS Symposium Series
EditorsDavid L. Nelson, M.Stanley Whittingham, Thomas F. George
PublisherACS
Pages181-191
Number of pages11
ISBN (Print)084121431X
StatePublished - 1 Dec 1987

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Stoichiometry
Copper
Oxygen
Twinning
Superconductivity
Semiconductor materials
Defects

Cite this

Murphy, D. W., Sunshine, S. A., Gallagher, P. K., O'Bryan, H. M., Cava, R. J., Batlogg, B., ... Zahurak, S. M. (1987). EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. . In D. L. Nelson, M. S. Whittingham, & T. F. George (Eds.), ACS Symposium Series (pp. 181-191). ACS.
Murphy, D. W. ; Sunshine, S. A. ; Gallagher, P. K. ; O'Bryan, H. M. ; Cava, R. J. ; Batlogg, B. ; van Dover, R. B. ; Schneemeyer, Lynn ; Zahurak, S. M. / EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. . ACS Symposium Series. editor / David L. Nelson ; M.Stanley Whittingham ; Thomas F. George. ACS, 1987. pp. 181-191
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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.",
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Murphy, DW, Sunshine, SA, Gallagher, PK, O'Bryan, HM, Cava, RJ, Batlogg, B, van Dover, RB, Schneemeyer, L & Zahurak, SM 1987, EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. . in DL Nelson, MS Whittingham & TF George (eds), ACS Symposium Series. ACS, pp. 181-191.

EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. . / Murphy, D. W.; Sunshine, S. A.; Gallagher, P. K.; O'Bryan, H. M.; Cava, R. J.; Batlogg, B.; van Dover, R. B.; Schneemeyer, Lynn; Zahurak, S. M.

ACS Symposium Series. ed. / David L. Nelson; M.Stanley Whittingham; Thomas F. George. ACS, 1987. p. 181-191.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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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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Murphy DW, Sunshine SA, Gallagher PK, O'Bryan HM, Cava RJ, Batlogg B et al. EFFECTS OF OXYGEN STOICHIOMETRY ON STRUCTURE AND PROPERTIES IN Ba//2YCu//3O//x. . In Nelson DL, Whittingham MS, George TF, editors, ACS Symposium Series. ACS. 1987. p. 181-191