Skip to main content

Substrate influence on dendritic flux instability in YBCO thin films

Journal Article


Abstract


  • We have investigated the effect of substrate thermal conductivity on dendritic flux formation in thin superconducting YBa 2Cu 3O7-x films grown on yttrium-stabilized zirconia, SrTiO 3, MgO, and sapphire, exploiting a recently developed ultra-fast magneto-optical imaging system and its ultra-fast field ramp (3 kT/s). Dendritic flux formation triggered solely by rapid ramping of the external field is reported for the first time in YBCO on yttrium-stabilized zirconia, the substrate with the lowest thermal conductivity. For the other substrates, the dendritic instability could be generated only after introducing an artificial defect at the edge, enhancing the local induction. We find that the upper temperature threshold for the appearance of dendrites depends on the thermal conductivity of the substrate.

Authors


  •   Baziljevich, M (external author)
  •   Baruch-El, E (external author)
  •   Yeshurun, Y (external author)
  •   Johansen, Tom H. (external author)

Publication Date


  • 2014

Citation


  • Baruch-El, E., Baziljevich, M., Johansen, T. H. & Yeshurun, Y. (2014). Substrate influence on dendritic flux instability in YBCO thin films. Journal of Superconductivity and Novel Magnetism, 28 (2), 379-382.

Scopus Eid


  • 2-s2.0-84906723685

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1304

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 379

End Page


  • 382

Volume


  • 28

Issue


  • 2

Abstract


  • We have investigated the effect of substrate thermal conductivity on dendritic flux formation in thin superconducting YBa 2Cu 3O7-x films grown on yttrium-stabilized zirconia, SrTiO 3, MgO, and sapphire, exploiting a recently developed ultra-fast magneto-optical imaging system and its ultra-fast field ramp (3 kT/s). Dendritic flux formation triggered solely by rapid ramping of the external field is reported for the first time in YBCO on yttrium-stabilized zirconia, the substrate with the lowest thermal conductivity. For the other substrates, the dendritic instability could be generated only after introducing an artificial defect at the edge, enhancing the local induction. We find that the upper temperature threshold for the appearance of dendrites depends on the thermal conductivity of the substrate.

Authors


  •   Baziljevich, M (external author)
  •   Baruch-El, E (external author)
  •   Yeshurun, Y (external author)
  •   Johansen, Tom H. (external author)

Publication Date


  • 2014

Citation


  • Baruch-El, E., Baziljevich, M., Johansen, T. H. & Yeshurun, Y. (2014). Substrate influence on dendritic flux instability in YBCO thin films. Journal of Superconductivity and Novel Magnetism, 28 (2), 379-382.

Scopus Eid


  • 2-s2.0-84906723685

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1304

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 379

End Page


  • 382

Volume


  • 28

Issue


  • 2