Current-carrying capacity dependence of composite Bi2Sr 2CaCu2O8 superconductors on the liquid coolant conditions

V. R. Romanovskii, Kazuo Watanabe, Satoshi Awaji, G. Nishijima

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The thermal runaway conditions of the composite Bi2Sr 2CaCu2O8 superconductor cooled by liquid helium or liquid hydrogen are compared. The study based on the static analysis of thermoelectric modes was made when the volume fraction of the superconductor in a composite was varied. Some specific trends underlying the onset of thermal runaway in superconducting composites cooled by liquid coolants are discussed. It is stated that the operating modes of superconducting composites may be characterized by stable states during which the current-carrying capacity of a superconductor is not effectively used even with a high amount of superconductor in the composite. These states are possible due to the corresponding temperature variation of the resistivities of the matrix and the superconductor in the high operating temperature range. They have to be considered in experiments when the critical current of a superconductor is determined or when the optimal stable operating modes of the current-carrying elements based on the Bi2Sr2CaCu2O8 superconductor, which is cooled by liquid coolant, are defined.

Original languageEnglish
Article number004
Pages (from-to)703-710
Number of pages8
JournalSuperconductor Science and Technology
Issue number8
Publication statusPublished - 2006 Aug 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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