Compressive and tensile axial strain reduced critical currents in Bi-2212 conductors

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Abstract

Mono and multifilamentary wires of BSCCO-2212 in Ag matrix are investigated in an axial strain experiment. The superconducting samples are soldered to a substrate that is bend in order to achieve a compressive or tensile axial strain. The I/sub c/-strain dependence is measured in magnetic fields up to 16 T at 4.2 K and the strain is varied from -2% to +1.2%. In these Bi-2122 samples any strain-induced I/sub c/ reduction is irreversible. Moreover a significant rise in I/sub c/ was never observed after changing the strain. Special attention is paid to the tensile axial strain regime (0 to 0.4%). A small but significant reduction in I/sub c/ is found in this case. The strain behaviour of these wires indicates that the I/sub c/ reduction is due to fractures in the superconducting filaments
Original languageUndefined
Pages (from-to)1298-1301
Number of pages4
JournalIEEE transactions on applied superconductivity
Volume5
Issue number5
DOIs
Publication statusPublished - 1995

Keywords

  • IR-24246
  • METIS-129046

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