Current Flow and Flux Pinning Properties of YBCO Foam Struts

Michael Rudolf Koblischka, Anjela Dimitrova Koblischka-Veneva, Kévin Berger, Quentin Nouailhetas, Bruno Douine, E. S. Reddy, Georg J. Schmitz

研究成果: Article

1 引用 (Scopus)

抄録

The current flow and the flux pinning properties on struts of superconducting YBa 2 Cu 3 O x foams are analyzed in detail in the temperature range 60 K ≤ T ≤ T c . For this purpose, magnetization loops were measured on foam struts taken from various positions of a 5 × 2 × 2 cm 3 large foam sample prepared at RWTH Aachen. From these data, the critical current densities, j c , and the flux pinning forces, F p = j c × B, were calculated and pinning force scaling diagrams F p /F p ,max versus h = H a /H irr were established. The scaling in the temperature range 60 K < T < 90 K was found to be well developed for all samples with peak positions, h 0 , above 0.4, which is an indication of δT c -pinning. The shape of the pinning functions is found to be completely different from all other high-T c materials and varies only slightly with position. This specific dome shape cannot be described by an addition of several pinning functions, and the parameters p and q do not fit to the description of Dew-Hughes. Therefore, we employ Kramer plots to obtainmore information on the flux pinning mechanism.

元の言語English
記事番号8624451
ジャーナルIEEE Transactions on Applied Superconductivity
29
発行部数5
DOI
出版物ステータスPublished - 2019 8 1

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Flux pinning
struts
Struts
flux pinning
foams
Foams
Critical current density (superconductivity)
dew
Domes
scaling
Magnetization
domes
critical current
Temperature
indication
plots
diagrams
current density
magnetization
temperature

ASJC Scopus subject areas

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

これを引用

Current Flow and Flux Pinning Properties of YBCO Foam Struts. / Koblischka, Michael Rudolf; Koblischka-Veneva, Anjela Dimitrova; Berger, Kévin; Nouailhetas, Quentin; Douine, Bruno; Reddy, E. S.; Schmitz, Georg J.

:: IEEE Transactions on Applied Superconductivity, 巻 29, 番号 5, 8624451, 01.08.2019.

研究成果: Article

Koblischka, Michael Rudolf ; Koblischka-Veneva, Anjela Dimitrova ; Berger, Kévin ; Nouailhetas, Quentin ; Douine, Bruno ; Reddy, E. S. ; Schmitz, Georg J. / Current Flow and Flux Pinning Properties of YBCO Foam Struts. :: IEEE Transactions on Applied Superconductivity. 2019 ; 巻 29, 番号 5.
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