Critical-state model with a secondary high-field peak

T. Johansen, Michael Rudolf Koblischka, H. Bratsberg, P. Hetland

研究成果: Article

31 引用 (Scopus)

抄録

A critical-state model capable of describing the experimentally observed secondary or fishtail peak in magnetization data for bulk high-(Formula presented) superconductors is introduced. As suggested by a recent understanding of the fishtail effect, the field dependence of the critical current density is taken as a sum of two terms; one giving rise to a low-field magnetization peak and another being responsible for the fishtail peak. The model, which extends the Kim model by adding a Lorentzian term in (Formula presented) allows analytical treatment. Expressions for internal flux-density profiles as well as the various branches of the magnetization loop are presented. It is shown that measured magnetization loops of (Formula presented) samples showing a very pronounced fishtail peak are well fitted by this model. Using our procedure, (Formula presented) can be determined without invoking the Bean model (with a constant (Formula presented)), and thus avoiding an inconsistency in the analysis.

元の言語English
ページ(範囲)11273-11278
ページ数6
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
56
発行部数17
DOI
出版物ステータスPublished - 1997 1 1
外部発表Yes

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Magnetization
magnetization
Superconducting materials
critical current
flux density
current density
Fluxes
profiles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Critical-state model with a secondary high-field peak. / Johansen, T.; Koblischka, Michael Rudolf; Bratsberg, H.; Hetland, P.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 56, 番号 17, 01.01.1997, p. 11273-11278.

研究成果: Article

Johansen, T. ; Koblischka, Michael Rudolf ; Bratsberg, H. ; Hetland, P. / Critical-state model with a secondary high-field peak. :: Physical Review B - Condensed Matter and Materials Physics. 1997 ; 巻 56, 番号 17. pp. 11273-11278.
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