Crystallographic description of phases in the Y-Ba-Cu-O superconductor

R. M. Hazen, L. W. Finger, R. J. Angel, C. T. Prewitt, N. L. Ross, H. K. Mao, C. G. Hadidiacos, P. H. Hor, R. L. Meng, C. W. Chu

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279 引文 斯高帕斯(Scopus)

摘要

Single-crystal x-ray techniques were used to determine two structures that comprise the Y-Ba-Cu-O superconductor. A green phase has the orthorhombic Y2BaCuO5 structure. An opaque phase (YBa2Cu3O6+x, 0x1.0) is tetragonal (a=3.859 A, c=11.71 A; space group P4m2;Z=1). The structure is related to a 1:1:3 ABO3 perovskite: Ba and Y order in A sites and Cu is in B sites. Systematic oxygen vacancies between adjacent copper atoms lead to a fivefold-coordinate Cu in proximity to Y and a twofold-coordinate Cu in the vicinity of the Ba site.

原文English
頁(從 - 到)7238-7241
頁數4
期刊Physical Review B
35
發行號13
DOIs
出版狀態Published - 1987

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

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