Analysis of pinning in NdBa2Cu3O7-δ superconductors

Michael Rudolf Koblischka, A. J J Van Dalen, T. Higuchi, S. I. Yoo, Masato Murakami

Research output: Contribution to journalArticle

174 Citations (Scopus)

Abstract

Current densities js and volume pinning forces Fp are obtained in a wide temperature (5≤T≤92 K) and field range(0≤μoHa≤9 T) on different NdBa2Cu3O7-δ samples. Above 60 K a good scaling of the volume pinning force Fp versus the reduced field h=Ha/Hirr can be established. The scaled pinning curves are compared to several theoretical predictions. Experimental evidence for strong pinning at extended superconducting defects (interaction volume Vpin∼ξ2d) is given. These defects are ascribed to spatial composition fluctuations found in light rare-earth superconductors, providing a scatter of the transition temperature Tc. Such a pinning mechanism is especially important for applications of high-Tc superconductors operating at T=77K.

Original languageEnglish
Pages (from-to)2863-2867
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume58
Issue number5
Publication statusPublished - 1998 Aug 1
Externally publishedYes

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Superconducting materials
Defects
Rare earths
Superconducting transition temperature
Current density
Chemical analysis
defects
rare earth elements
Temperature
transition temperature
current density
scaling
curves
predictions
interactions
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Analysis of pinning in NdBa2Cu3O7-δ superconductors. / Koblischka, Michael Rudolf; Van Dalen, A. J J; Higuchi, T.; Yoo, S. I.; Murakami, Masato.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 58, No. 5, 01.08.1998, p. 2863-2867.

Research output: Contribution to journalArticle

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