Local structure of Y1-xCaxSr2Cu2GaO7 superconductors

J. P. Zhang; D. A. Groenke; H. Zhang; D. I. DeLoach; B. Dabrowski; K. R. Poeppelmeier; V. P. Dravid; L. D. Marks

doi:10.1016/0921-4534(92)90295-N

Local structure of Y_1-xCa_xSr₂Cu₂GaO₇ superconductors

J. P. Zhang, D. A. Groenke, H. Zhang, D. I. DeLoach, B. Dabrowski, K. R. Poeppelmeier, V. P. Dravid, L. D. Marks

Northwestern University

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The variation in the average and local structure of the superconductor family Y_1-xCa_xSr₂Cu₂GaO₇ as calcium is substituted for yttrium (x = 0.20, 0.35, and 0.40) is presented and discussed. Electron microscopy and X-ray diffraction were the primary techniques employed. The local structure found by the use of electron microscopy and X-ray diffraction agrees with that previously derived from single crystal X-ray and neutron diffraction. The gallate can be confused with the three layer perovskite structure of YBCO (YBa₂Cu₃O₇) because of the similarity of [011]_Ga≈[100]_YBCO and [010]_Ga≈[110]_YBCO zones. However, the composition of all crystals examined were homogeneous on a 10-100 nm scale. It was also found that the twin structure varied as a function of the calcium content.

Original language	English
Pages (from-to)	51-60
Number of pages	10
Journal	Physica C: Superconductivity and its applications
Volume	202
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(92)90295-N
Publication status	Published - Nov 1 1992

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Local structure of Y1-xCaxSr2Cu2GaO7 superconductors",

abstract = "The variation in the average and local structure of the superconductor family Y1-xCaxSr2Cu2GaO7 as calcium is substituted for yttrium (x = 0.20, 0.35, and 0.40) is presented and discussed. Electron microscopy and X-ray diffraction were the primary techniques employed. The local structure found by the use of electron microscopy and X-ray diffraction agrees with that previously derived from single crystal X-ray and neutron diffraction. The gallate can be confused with the three layer perovskite structure of YBCO (YBa2Cu3O7) because of the similarity of [011]Ga≈[100]YBCO and [010]Ga≈[110]YBCO zones. However, the composition of all crystals examined were homogeneous on a 10-100 nm scale. It was also found that the twin structure varied as a function of the calcium content.",

author = "Zhang, {J. P.} and Groenke, {D. A.} and H. Zhang and DeLoach, {D. I.} and B. Dabrowski and Poeppelmeier, {K. R.} and Dravid, {V. P.} and Marks, {L. D.}",

note = "Funding Information: This work was supported by the NSF-DMR program through the Science and Technology Center for Superconductivity grant number NSF-DMR-8809854.",

year = "1992",

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doi = "10.1016/0921-4534(92)90295-N",

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T1 - Local structure of Y1-xCaxSr2Cu2GaO7 superconductors

AU - Zhang, J. P.

AU - Groenke, D. A.

AU - Zhang, H.

AU - DeLoach, D. I.

AU - Dabrowski, B.

AU - Poeppelmeier, K. R.

AU - Dravid, V. P.

AU - Marks, L. D.

N1 - Funding Information: This work was supported by the NSF-DMR program through the Science and Technology Center for Superconductivity grant number NSF-DMR-8809854.

PY - 1992/11/1

Y1 - 1992/11/1

N2 - The variation in the average and local structure of the superconductor family Y1-xCaxSr2Cu2GaO7 as calcium is substituted for yttrium (x = 0.20, 0.35, and 0.40) is presented and discussed. Electron microscopy and X-ray diffraction were the primary techniques employed. The local structure found by the use of electron microscopy and X-ray diffraction agrees with that previously derived from single crystal X-ray and neutron diffraction. The gallate can be confused with the three layer perovskite structure of YBCO (YBa2Cu3O7) because of the similarity of [011]Ga≈[100]YBCO and [010]Ga≈[110]YBCO zones. However, the composition of all crystals examined were homogeneous on a 10-100 nm scale. It was also found that the twin structure varied as a function of the calcium content.

AB - The variation in the average and local structure of the superconductor family Y1-xCaxSr2Cu2GaO7 as calcium is substituted for yttrium (x = 0.20, 0.35, and 0.40) is presented and discussed. Electron microscopy and X-ray diffraction were the primary techniques employed. The local structure found by the use of electron microscopy and X-ray diffraction agrees with that previously derived from single crystal X-ray and neutron diffraction. The gallate can be confused with the three layer perovskite structure of YBCO (YBa2Cu3O7) because of the similarity of [011]Ga≈[100]YBCO and [010]Ga≈[110]YBCO zones. However, the composition of all crystals examined were homogeneous on a 10-100 nm scale. It was also found that the twin structure varied as a function of the calcium content.

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Local structure of Y_1-xCa_xSr₂Cu₂GaO₇ superconductors

Abstract

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