Local structure of Y1-xCaxSr2Cu2GaO7 superconductors

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

Northwestern University

Research output: Contribution to journal › Article

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

Condensed Matter Physics

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Zhang, J. P., Groenke, D. A., Zhang, H., DeLoach, D. I., Dabrowski, B., Poeppelmeier, K. R., Dravid, V. P., & Marks, L. D. (1992). Local structure of Y_1-xCa_xSr₂Cu₂GaO₇ superconductors. Physica C: Superconductivity and its Applications, 202(1-2), 51-60. https://doi.org/10.1016/0921-4534(92)90295-N

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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.",

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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, Kenneth R

AU - Dravid, V. P.

AU - Marks, L. D.

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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