Flux pinning by columnar defects in high-temperature superconducting crystals

M. Konczykowski, Y. Yeshurun, L. Klein, E. R. Yacoby, N. Chikumoto, V. M. Vinokur, M. V. Feigel'man

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Y-Ba-Cu-O:123 and Bi-Sr-Ca-Cu-O:2212 crystals were irradiated with 5.8 GeV Pb ions. The columnar defects, produced by this irradiation are expected to yield the strongest possible pinning energy. Indeed, there is an apparent increase in the width of the magnetization curves. However, the results of magnetic relaxation experiments indicate the energy barrier for flux creep from the columnar defects much smaller than expected pinning energy. This effect is explained in terms of nucleation of vortex loop mechanism of flux creep. The estimate of pinning energy of columnar defect can be obtained from measurement of the angular dependence of the magnetization curves.

Original languageEnglish
Pages (from-to)407-410
Number of pages4
JournalJournal of Alloys and Compounds
Volume195
Issue numberC
DOIs
Publication statusPublished - 10 May 1993
Externally publishedYes

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