Substrate Influence on Dendritic Flux Instability in YBCO Thin Films

E. Baruch-El; M. Baziljevich; T. H. Johansen; Y. Yeshurun

doi:https://doi.org/10.1007/s10948-014-2723-9

Substrate Influence on Dendritic Flux Instability in YBCO Thin Films

E. Baruch-El, M. Baziljevich, T. H. Johansen, Y. Yeshurun

Department of Physics

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

Abstract

We have investigated the effect of substrate thermal conductivity on dendritic flux formation in thin superconducting YBa ₂Cu ₃O_7−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.

Original language	English
Pages (from-to)	379-382
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	28
Issue number	2
DOIs	https://doi.org/10.1007/s10948-014-2723-9
State	Published - Feb 2014

Keywords

Dendritic flux instability
High temperature superconductors (HTS)
Thermal conductivity
Ultra-fast magneto-optical (MO) imaging

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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https://doi.org/10.1007/s10948-014-2723-9

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title = "Substrate Influence on Dendritic Flux Instability in YBCO Thin Films",

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.",

keywords = "Dendritic flux instability, High temperature superconductors (HTS), Thermal conductivity, Ultra-fast magneto-optical (MO) imaging",

author = "E. Baruch-El and M. Baziljevich and Johansen, {T. H.} and Y. Yeshurun",

note = "Publisher Copyright: {\textcopyright} 2014, Springer Science+Business Media New York.",

year = "2014",

month = feb,

doi = "https://doi.org/10.1007/s10948-014-2723-9",

language = "الإنجليزيّة",

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T1 - Substrate Influence on Dendritic Flux Instability in YBCO Thin Films

AU - Baruch-El, E.

AU - Baziljevich, M.

AU - Johansen, T. H.

AU - Yeshurun, Y.

PY - 2014/2

Y1 - 2014/2

N2 - 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.

AB - 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.

KW - Dendritic flux instability

KW - High temperature superconductors (HTS)

KW - Thermal conductivity

KW - Ultra-fast magneto-optical (MO) imaging

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U2 - https://doi.org/10.1007/s10948-014-2723-9

DO - https://doi.org/10.1007/s10948-014-2723-9

M3 - مقالة

SN - 1557-1939

VL - 28

SP - 379

EP - 382

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 2

ER -

Substrate Influence on Dendritic Flux Instability in YBCO Thin Films

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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