Magnetic field distribution in superconducting composites as revealed by ESR-probe and magnetization

D. Davidov, N. Bontemps, M. Golosovsky*, G. Waysand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The distribution of a static magnetic field in superconductor-insulator composites consisting of BSCCO (YBCO) powder in paraffin wax is studied by ESR bulk probing and magnetization. The average field and field variance in the non-superconducting host are measured as function of temperature and volume fraction of superconductor. We develop a model of the field distribution in dilute magnetic and superconducting composites that relates the field inhomogeneity to magnetization and particle shape. We find that this model satisfactorily describes field distribution in our superconducting composites in the regime of strong flux pinning, i.e. below irreversibility line. We find deviations from the model above the irreversibility line and attribute this to flux motion. We show that the field distribution in superconducting composites is determined not only by magnetization and particle shape, but is strongly affected by the flux profile within the superconducting particles.

Original languageEnglish
Pages (from-to)111-123
Number of pages13
JournalPhysica C: Superconductivity and its Applications
Volume297
Issue number1-2
DOIs
StatePublished - 1 Mar 1998

Keywords

  • ESR-probing
  • Inhomogeneous magnetic field distribution
  • Superconducting composites

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