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

doi:10.1103/PhysRevB.35.7238

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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Abstract

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.

Original language	English
Pages (from-to)	7238-7241
Number of pages	4
Journal	Physical Review B
Volume	35
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.35.7238
Publication status	Published - 1987

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.35.7238

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title = "Crystallographic description of phases in the Y-Ba-Cu-O superconductor",

abstract = "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.",

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

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T1 - Crystallographic description of phases in the Y-Ba-Cu-O superconductor

AU - Hazen, R. M.

AU - Finger, L. W.

AU - Angel, R. J.

AU - Prewitt, C. T.

AU - Ross, N. L.

AU - Mao, H. K.

AU - Hadidiacos, C. G.

AU - Hor, P. H.

AU - Meng, R. L.

AU - Chu, C. W.

PY - 1987

Y1 - 1987

N2 - 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.

AB - 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.

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

Abstract

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