Enhanced flux pinning in Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O superconductors tapes with addition of magnetic nanorod γ-Fe2O3

K. T. Lau, S. Y. Yahya, Roslan Abd. Shukor

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The pinning strength of the Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O tapes with the addition of magnetic nanorod γ-Fe2O3 is studied using the exponent n values obtained from power law current-electric field (I-E) characteristics. The starting composition of the γ-Fe2O 3 added samples is Bi1.6Pb0.4Sr 2Ca2Cu3O10-(γ-Fe 2O3)0.01. The rate of decrease of n values in applied fields for the tapes with nano-γ-Fe2O3 is found lower than the tapes without nano-γ-Fe2O3. This indicates that the pinning strength for the tapes with nano γ-Fe 2O3 is relatively higher than the tapes prepared without nano γ-Fe2O3. The results are supported by two conventional methods which are normally used to compare the pinning strength of superconductor tapes. Magnetic impurities generally suppress superconductivity. However, our study shows that magnetic nanorod γ-Fe2O 3 enhanced the pinning strength of Ag-sheathed Bi-Sr-Ca-Cu-O superconductor tapes. This is consistent with previous calculations on frozen flux superconductor with magnetic nanorod as pinning centers.

Original languageEnglish
Article number123904
JournalJournal of Applied Physics
Volume99
Issue number12
DOIs
Publication statusPublished - 2006

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BSCCO superconductors
flux pinning
tapes
nanorods
superconductivity
exponents
impurities
electric fields

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Enhanced flux pinning in Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O superconductors tapes with addition of magnetic nanorod γ-Fe2O3 . / Lau, K. T.; Yahya, S. Y.; Abd. Shukor, Roslan.

In: Journal of Applied Physics, Vol. 99, No. 12, 123904, 2006.

Research output: Contribution to journalArticle

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