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Effects of thermal shunt to substrate on normal zone propagation in high-critical temperature superconducting thin films.

Author(s) : LEVILLAIN C., MANUEL P., THEROND P. G.

Type of article: Article

Summary

It appears that conventional analyses by the transient heat equation of the normal zone propagation in high-critical temperature superconducting thin films grown on aluminium oxide are inappropriate for this kind of system. The computational results indicate that the substrate, with its high value of thermal conductivity, is an efficient thermal shunt for the normal zone propagation in the thin film. This effect induces a significant increase in the quench velocity. Furthermore, the substrate is a good stabilizer: the minimum quench energy of the system is high for a current far from the critical value; in addition, the high-critical temperature superconducting film is cooled efficiently. Thus these thin films deposited on a aluminium oxide substrate are very stable against a pulsed disturbance or an accidental transition.

Details

  • Original title: Effects of thermal shunt to substrate on normal zone propagation in high-critical temperature superconducting thin films.
  • Record ID : 1994-3363
  • Languages: English
  • Source: Cryogenics - vol. 34 - n. 1
  • Publication date: 1994/01

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