Induced currents in Bi-(2223) superconducting tapes in a magnetic field

L. Pust, P. Nalevka, A. Galkin, Michael Rudolf Koblischka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The position Bmax of the maximum of magnetic hysteresis loops (MHL) close to zero external magnetic field Bext, in as prepared (Bi,Pb)-2223/Ag tapes, shifts with decreasing temperature anomalously towards positive Bext on the descending-field branch of MHL. The field Bmax increases steeply below 15 K reaching +0.15 T at 2.5 K. Bmax(T) is quite similar for rolled and pressed tapes and for tapes with and without a silver sheath. MHL are asymmetric at low temperatures with larger moments on the upper MHL branch. This asymmetry appears below a threshold temperature T* ≈ 0.6 Tirr, where Tirr is an ″irreversible″ temperature. The rate of flux creep changes very significantly at the MHL maximum. We propose that Bmax > 0 can also be observed on a virtual granular superconducting material formed by planes of flat disk-shaped grains with just small contacts at the disk circumferences. Bmax is positive due to a change of sign of stray fields close to the grain circumferences.

Original languageEnglish
Pages (from-to)197-201
Number of pages5
JournalSuperlattices and Microstructures
Volume21
Issue numberSuppl A
Publication statusPublished - 1997 Jan 1
Externally publishedYes

Fingerprint

Superconducting tapes
Magnetic hysteresis
Induced currents
Hysteresis loops
tapes
hysteresis
Magnetic fields
Tapes
magnetic fields
circumferences
Temperature
Granular materials
Silver
sheaths
Superconducting materials
temperature
Creep
silver
asymmetry
Fluxes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Induced currents in Bi-(2223) superconducting tapes in a magnetic field. / Pust, L.; Nalevka, P.; Galkin, A.; Koblischka, Michael Rudolf.

In: Superlattices and Microstructures, Vol. 21, No. Suppl A, 01.01.1997, p. 197-201.

Research output: Contribution to journalArticle

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