Ca induced line defects and superconductivity in YxSr2Cu2GaO7

J. P. Zhang; D. A. Groenke; B. Dabrowski; K. R. Poeppelmeier; L. D. Marks

doi:10.1016/0921-4534(94)90080-9

Ca induced line defects and superconductivity in Y_xSr₂Cu₂GaO₇

J. P. Zhang, D. A. Groenke, B. Dabrowski, K. R. Poeppelmeier, L. D. Marks^*

^*Corresponding author for this work

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

3 Scopus citations

Abstract

The microstructure of Ca doped Y_1-xCa_xSr₂Cu₂GaO₇ and Ca substituted YSr_2-xCa_xCu₂GaO₇ have been investigated by electron microscopy. A common feature found in the Y_1-xCa_xSr₂Cu₂GaO₇ superconductors is the existence of line defects, which are not observed in non-superconducting YSr_2-xCa_xCu₂GaO₇. At the higher doping level, x ≈ 0.35, the line defects develop into modulated structures. The transition temperature and Meissner fraction increases with the doping level as does the defect concentration, indicating that the defects and superconductivity in these materials are interrelated. The line defects are associated with an asymmetrical distortion (a_p ≠ b_p) of the gallium-oxygen plane which plays a similar role to the copper-oxygen chains in YBa₂Cu₃O_7-°.

Original language	English (US)
Pages (from-to)	259-266
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	227
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(94)90080-9
State	Published - Jul 1 1994

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 = "Ca induced line defects and superconductivity in YxSr2Cu2GaO7",

abstract = "The microstructure of Ca doped Y1-xCaxSr2Cu2GaO7 and Ca substituted YSr2-xCaxCu2GaO7 have been investigated by electron microscopy. A common feature found in the Y1-xCaxSr2Cu2GaO7 superconductors is the existence of line defects, which are not observed in non-superconducting YSr2-xCaxCu2GaO7. At the higher doping level, x ≈ 0.35, the line defects develop into modulated structures. The transition temperature and Meissner fraction increases with the doping level as does the defect concentration, indicating that the defects and superconductivity in these materials are interrelated. The line defects are associated with an asymmetrical distortion (ap ≠ bp) of the gallium-oxygen plane which plays a similar role to the copper-oxygen chains in YBa2Cu3O7-°.",

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

note = "Funding Information: This work was supported by the Science and Technology Center for Superconductivity on grant number NSF/DMR-9120000.",

year = "1994",

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doi = "10.1016/0921-4534(94)90080-9",

language = "English (US)",

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T1 - Ca induced line defects and superconductivity in YxSr2Cu2GaO7

AU - Zhang, J. P.

AU - Groenke, D. A.

AU - Dabrowski, B.

AU - Poeppelmeier, K. R.

AU - Marks, L. D.

N1 - Funding Information: This work was supported by the Science and Technology Center for Superconductivity on grant number NSF/DMR-9120000.

PY - 1994/7/1

Y1 - 1994/7/1

N2 - The microstructure of Ca doped Y1-xCaxSr2Cu2GaO7 and Ca substituted YSr2-xCaxCu2GaO7 have been investigated by electron microscopy. A common feature found in the Y1-xCaxSr2Cu2GaO7 superconductors is the existence of line defects, which are not observed in non-superconducting YSr2-xCaxCu2GaO7. At the higher doping level, x ≈ 0.35, the line defects develop into modulated structures. The transition temperature and Meissner fraction increases with the doping level as does the defect concentration, indicating that the defects and superconductivity in these materials are interrelated. The line defects are associated with an asymmetrical distortion (ap ≠ bp) of the gallium-oxygen plane which plays a similar role to the copper-oxygen chains in YBa2Cu3O7-°.

AB - The microstructure of Ca doped Y1-xCaxSr2Cu2GaO7 and Ca substituted YSr2-xCaxCu2GaO7 have been investigated by electron microscopy. A common feature found in the Y1-xCaxSr2Cu2GaO7 superconductors is the existence of line defects, which are not observed in non-superconducting YSr2-xCaxCu2GaO7. At the higher doping level, x ≈ 0.35, the line defects develop into modulated structures. The transition temperature and Meissner fraction increases with the doping level as does the defect concentration, indicating that the defects and superconductivity in these materials are interrelated. The line defects are associated with an asymmetrical distortion (ap ≠ bp) of the gallium-oxygen plane which plays a similar role to the copper-oxygen chains in YBa2Cu3O7-°.

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U2 - 10.1016/0921-4534(94)90080-9

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JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 3-4

ER -

Ca induced line defects and superconductivity in Y_xSr₂Cu₂GaO₇

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