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Superconductivity in La-doped Bi “2201”

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Author(s)

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

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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.

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

    Research areas

  • PHASES, SYSTEM, BI2+XSR2-XCUOZ

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