2.2-GeV Au-ions irradiation is used to study the effect of columnar defects on the transport properties of Bi2Sr2CaCu2O8+δ (Bi2212) bicrystals with high quality c-axis twist grain boundary. The studies show a similar increase in the irreversible temperature determined within the single crystals and across the grain boundaries after irradiation. However, the irradiation enhancement on the grain boundary critical current (Ic) at low temperatures is small, compared to the more than an order of magnitude increase of single crystal Ic.

Topics
Crystallographic defects, Superconductivity, Transport properties
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© 1999 American Institute of Physics.
1999
American Institute of Physics
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