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Temperature-dependent scaling of pinning force data in Bi-based high-Tc superconductors

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  • M. R. Koblischka
  • J. Sosnowski

Abstract

The scaling of the normalized volume pinning forces, Fp/Fp,max, versus a reduced field h=Ha/Hscale has proven to be a very informative tool to study the origin of the flux pinning in superconductors. Remarkably, on Bi2Sr2Ca2Cu3O10+δ (Bi-2223) and Bi2Sr2CaCu2O8+δ (Bi-2212) data were mostly analyzed only in a narrow temperature range around 77 K. Here, we present a study of the pinning forces in various Bi-2223 samples at temperatures between 18 K and 80 K. The measurements clearly reveal that there is an apparent non-scaling of the pinning force data; instead, two clearly different temperature regimes for the scaling can be recognized, which are found to be in direct relation to a second step observed in the m(T) curves obtained upon field-cooling and -warming. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • M. R. Koblischka & J. Sosnowski, 2005. "Temperature-dependent scaling of pinning force data in Bi-based high-Tc superconductors," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 44(3), pages 277-280, April.
    • Handle: RePEc:spr:eurphb:v:44:y:2005:i:3:p:277-280
    DOI: 10.1140/epjb/e2005-00126-3
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