Increased flux pinning in both pure and carbon-nanotube-embedded Bi-2212 superconductors

Sun Li Huang, M. R. Koblischka, K. Fossheim, T. W. Ebbesen, T. H. Johansen

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Abstract

In this work, we have prepared both Bi2Sr2CaCu2O8+δ samples (Bi-2212) and Bi2Sr2CaCu2O8+δ samples with carbon nanotubes embedded (CNTE Bi-2212) by partial-melting processing. AC susceptibilty measurements show that the Bi-2212 samples as well as the CNTE Bi-2212 samples have a sharp transition at 94K and -86K, respectively. The pinning properties of these samples are studied by means of magneto-optical visualization of flux distribution up to 77K. The results indicate that our Bi-2212 samples have obviously enhanced pinning capacity, and in our CNTE Bi-2212 samples, the pinning is even stronger and the fields of flux entry are doubled at intermediate temperatures compared to those of our Bi-2212 samples.

Original languageEnglish
Pages (from-to)2279-2280
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume282
Issue numberPART 4
DOIs
Publication statusPublished - 1997 Aug

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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