Quench development in thin inhomogeneous HTS film on sapphire substrate

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14 Scopus citations


The quench dynamics in a high-temperature superconducting thin film with a strong inhomogeneity of the critical current was experimentally studied in the circuit with a DC voltage source. The dependence of the normal zone length on time was found to be of 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. This phenomenon is explained by the dependence of thermal parameters of the sapphire substrate on temperature, in particular, a dramatic reduction of the heat conductivity of the sapphire with the increase of temperature. The numerical simulation confirms this explanation.

Original languageEnglish
Pages (from-to)291-298
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Issue number4
StatePublished - 1 Feb 2002


  • Heat equation
  • 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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