Anomalous reentrant resistance phenomena in superconducting Sr1-xKxBiO3: Recovery of superconductivity with electric or magnetic field

D. C. Kim, J. S. Kim, H. R. Kang, Y. W. Park, J. S. Pshirkov, E. V. Antipov

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The temperature-dependent resistivity of Sr1-xKxBiC3, with x = 0.4-0.6, has been measured as a function of the magnetic field (or electrical current). Although X-ray diffraction results are more or less identical to single phase for the measured 10 samples, the EDS results indicate that the potassium content, x, varies from 0.4 to 0.6 and the electrical resistance varies quite sensitively from sample to sample. For the samples of resistivity less than 4 mΩ cm at room temperature with p(15K)/p(273K) < 0.9, superconductivity is observed with Tc ∼ 12 K. Other samples exhibit a reentrant resistance below the superconducting transition temperature. The reentrant resistance, however, decreases as the external magnetic field (or electrical current) is applied, and some samples show the recovery of superconductivity upon the application of a magnetic field (or electrical current). Disorderness in the junction area between superconducting grains seems to be vital for the observed anomalous reentrant resistance. Further investigations are on to understand this intriguing phenomena.

Original languageEnglish
Pages (from-to)341-345
Number of pages5
JournalJournal of Superconductivity
Volume14
Issue number2
Publication statusPublished - 2001
Externally publishedYes

Keywords

  • Disorderness
  • Reentrant resistance phenomena
  • SrKBiO
  • Superconductivity

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