On the evolution of phases in polycrystalline li-doped 2212 bscco and enhanced superconducting behaviour via n(li,a)t reactions

Justin Schwartz, S. Wu, G. W. Raban, J. C. Rynes

Research output: Contribution to journalLetter

10 Scopus citations

Abstract

We report on the evolution of phases upon cooling of partially-melted Bi-Sr-Ca-Cu-Li-0 powders and tapes and on enhanced magnetic flux-pinning through irradiation. Enhanced resistive transitions have been obtained despite significant amounts of (Sr1-δ,Caδ)nCuOx phases (where n=l or 2). Here, the evolution of phases is investigated in Li-doped and undoped 2212 via extensive mi-crostructural characterizations. To enhance the flux-pinning, we have neutron irradiated Li-doped and undoped 2212. In addition to the neutron-collision-induced damage, the n+6Li -> 3T+4a+4.89 MeV and the n + 7Li -> 3T + 4a + n - 2.5 MeV fission reactions produce a homogeneous distribution of high and low energy charged particles. Effects of irradiation upon the magnetically measured Tc and JCim(H) are reported. Differences between the effects upon doped and undoped superconducting powders are discussed to highlight the effects of the charged particle damage.

Original languageEnglish (US)
Pages (from-to)1652-1658
Number of pages7
JournalIEEE Transactions on Applied Superconductivity
Volume3
Issue number1
DOIs
StatePublished - Jan 1 1993

All Science Journal Classification (ASJC) codes

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

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