Double plateau Tc behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz superconductor

J. M.S. Skakle; A. Templeton; E. E. Lachowski; A. R. West

doi:10.1016/0921-4534(96)00127-X

Double plateau T_c behaviour in the tetragonal LaBa_1.5Ca_0.5Cu₃O_z superconductor

J. M.S. Skakle^*, A. Templeton, E. E. Lachowski, A. R. West

^*Corresponding author for this work

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

Slowly cooled samples of the tetragonal superconductor LaBa_1.5Ca_0.5Cu₃O_z show a "double plateau" in plots of T_c against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in T_c of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.

Original language	English
Pages (from-to)	137-142
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	260
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(96)00127-X
Publication status	Published - 1 Apr 1996

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ASJC Scopus subject areas

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

Cite this

Skakle, J. M. S., Templeton, A., Lachowski, E. E., & West, A. R. (1996). Double plateau T_c behaviour in the tetragonal LaBa_1.5Ca_0.5Cu₃O_z superconductor. Physica C: Superconductivity and its Applications, 260(1-2), 137-142. https://doi.org/10.1016/0921-4534(96)00127-X

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AU - Skakle, J. M.S.

AU - Templeton, A.

AU - Lachowski, E. E.

AU - West, A. R.

N1 - We thank Engineering and Physical Sciences Research Council (EPSRC) for funding.

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N2 - Slowly cooled samples of the tetragonal superconductor LaBa1.5Ca0.5Cu3Oz show a "double plateau" in plots of Tc against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in Tc of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.

AB - Slowly cooled samples of the tetragonal superconductor LaBa1.5Ca0.5Cu3Oz show a "double plateau" in plots of Tc against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in Tc of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.

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