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

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

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)137-142
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume260
Issue number1-2
DOIs
Publication statusPublished - 1 Apr 1996

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Superconducting materials
plateaus
Oxygen
Oxygen vacancies
Electron diffraction
oxygen
electron diffraction
plots
histories
cells
Hot Temperature

ASJC Scopus subject areas

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

Cite this

Double plateau Tc behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz superconductor. / Skakle, J. M.S.; Templeton, A.; Lachowski, E. E.; West, A. R.

In: Physica C: Superconductivity and its Applications, Vol. 260, No. 1-2, 01.04.1996, p. 137-142.

Research output: Contribution to journalArticle

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AU - Lachowski, E. E.

AU - West, A. R.

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

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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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