Increased pinning energies and critical current densities in heavy-ion-irradiated Bi2Sr2CaCu2O8 single crystals

J. A. Cutro, D. A. Rudman, T. P. Orlando, R. B. Van Dover, L. F. Schneemeyer, A. E. White, E. M. Gyorgy, J. V. Waszczak, R. J. Felder

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Abstract

We report a significant increase in the pinning energy of vortices in single-crystal Bi2Sr2CaCu2O8 when irradiated with heavy ions such as Ar+. This is in contrast with the results of light ion (H+, He+) irradiations which give pinning energies comparable with those of unirradiated crystals. The stronger pinning is attributed to defects larger than point defects, e.g., clusters or amorphized regions. As a result of higher pinning energies, critical currents persist at markedly higher temperatures and fields.

Original languageEnglish
Pages (from-to)759-761
Number of pages3
JournalApplied Physics Letters
Volume62
Issue number7
DOIs
StatePublished - 1 Dec 1993

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