Behavior of an inhomogeneous HTS film in the regime of a resistive current limiter

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4 Scopus citations


A high-temperature superconducting (HTS) YBCO thin film covered by a gold layer on sapphire substrate is a very attractive element for building resistive current limiters. The quench dynamics in an HTS thin film with a strong inhomogeneity of the critical current was studied in the circuits with AC and DC voltage sources. The temporal dependence of the normal zone length was found to be of a non-monotonic character. After the normal zone propagates at some distance, it reverses the direction of its motion. The successive returns of the film sections into the superconducting state are observed. Under AC condition, the normal zone can be divided into several parts separated by superconducting regions. This phenomenon is explained by the dependence of the thermal parameters of the sapphire substrate on temperature, in particular, the dramatic reduction of the heat conductivity of the sapphire with the increase of temperature.

Original languageEnglish
Pages (from-to)1649-1652
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 3
StatePublished - 1 Aug 2002


  • High-T superconductors
  • Quenching
  • Thin films

ASJC Scopus subject areas

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


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