Applied Physics Letters

Enhanced current density Jc and extended irreversibility in single-crystal Bi2Sr2Ca1Cu2O 8 via linear defects from heavy ion irradiation

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Large enhancements in the critical current density Jc were produced in single crystals of the high-temperature superconductor Bi 2Sr2Ca1Cu2O8 by irradiation with high energy Sn ions. In addition, the irreversibility line was moved to considerably higher magnetic fields. In contrast with analogous studies on Y1Ba2Cu3O7, there was little, if any, selective pinning when the magnetizing field was applied parallel to the linear, ion-damage-produced tracks.