Flux Pinning Analysis of Superconducting YBCO Foam Struts

Michael R. Koblischka, Anjela Koblischka-Veneva, Crosby Soon Chang, Thomas Hauet, E. Sudhakar Reddy, Georg J. Schmitz

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Magnetization loops were measured on struts of superconducting YBa 2 Cu 3 O x (YBCO, 123-phase) foams taken from various positions of a 5 × 2 × 2 cm 3 large foam sample prepared at RWTH Aachen. From these data, 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 ≤ 85 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. From microstructure analysis using the electron backscatter diffraction technique (EBSD), it is known that the struts are fully converted into the 123-phase with embedded 211 particles being relatively small. The variation of F p depending on the position of the struts in the original sample directly reveals the changes of the texture as found employing EBSD.

Original languageEnglish
Article number8528518
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number3
DOIs
Publication statusPublished - 2019 Apr

Keywords

  • Flux pinning
  • YBa2Cu3Ox (YBCO)
  • foam
  • irreversibility fields
  • magnetization
  • scaling

ASJC Scopus subject areas

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

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