Superconductivity in La-doped Bi “2201”

DC SINCLAIR*, S TAIT, JTS IRVINE, AR WEST, John Thomas Sirr Irvine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

La3+ substitution into the Bi 2201 structure, of the ''ideal'' composition Bi2Sr2CuOdelta, has been investigated by means of an extensive phase diagram study into the solid solution formation al 885-degrees-C in air. Single phase solid solutions may be represented by the formula Bi2+xSr2-x-yLayCuOdelta, where y has a maximum value of 0.6, With increasing La content, the crystal symmetry changes from orthorhombic to tetragonal and the incommensurate supercell becomes less pronounced, as indicated by a decrease in intensity of the supercell X-ray powder reflections. Superconducting T(conset) values vary systematically with cation contents x, y and oxygen content delta; a maximum T(c) of 36.5 K is observed for composition x= -0.05, y=0.4.

Original languageEnglish
Pages (from-to)323-328
Number of pages6
JournalPhysica C: Superconductivity
Volume205
Issue number3-4
DOIs
Publication statusPublished - 1 Feb 1993

Keywords

  • PHASES
  • SYSTEM
  • BI2+XSR2-XCUOZ

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