Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure

P. V P S S Sastry, A. D. Robertson, A. R. West*

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Stabilities of all three superconducting phases in the Bi-Sr-Ca-Cu-O system under high oxygen pressure were investigated over a wide range of temperatures. Only the 2201 phase is stable under high oxygen pressure; the 2212 and 2223 phases transform to a new orthorhombic perovskite-related phase of the GdFeO3 type. Its average composition is (Sr,Ca)0.75(Bi,Cu)1.00O3-δ with lattice parameters a=6.0082(7), b=8.3768(14) and c=5.8631(8) A ̊. This new phase is non-superconducting but readily reconverts to a superconducting 2212 phase when re-annealed in air.

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume250
Issue number1-2
DOIs
Publication statusPublished - 1 Aug 1995
Externally publishedYes

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BSCCO superconductors
high pressure oxygen
Superconducting materials
Oxygen
Perovskite
Lattice constants
lattice parameters
air
Air
Chemical analysis
Temperature
temperature
perovskite

Cite this

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title = "Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure",
abstract = "Stabilities of all three superconducting phases in the Bi-Sr-Ca-Cu-O system under high oxygen pressure were investigated over a wide range of temperatures. Only the 2201 phase is stable under high oxygen pressure; the 2212 and 2223 phases transform to a new orthorhombic perovskite-related phase of the GdFeO3 type. Its average composition is (Sr,Ca)0.75(Bi,Cu)1.00O3-δ with lattice parameters a=6.0082(7), b=8.3768(14) and c=5.8631(8) A ̊. This new phase is non-superconducting but readily reconverts to a superconducting 2212 phase when re-annealed in air.",
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Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure. / Sastry, P. V P S S; Robertson, A. D.; West, A. R.

In: Physica C: Superconductivity and its Applications, Vol. 250, No. 1-2, 01.08.1995, p. 82-86.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Sastry, P. V P S S

AU - Robertson, A. D.

AU - West, A. R.

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Y1 - 1995/8/1

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