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RELATION OF CRITICAL CURRENT IRREVERSIBILITY TO TRAPPED FLUX AND MICROSTRUCTURE IN POLYCRYSTALLINE YBACUO.

Author(s) : EVETTS J. E., GLOWACKI B. A.

Type of article: Article

Summary

A STUDY HAS BEEN MADE OF THE CRITICAL CURRENT IN THESE SILVER CLAD WIRES. DETAILED RESISTIVE TRANSITIONS, IN ZERO MAGNETIC FIELD AND WITH A MAGNETIC FIELD APPLIED, INDICATE THAT BELOW 0.001 V/M THESE MATERIALS DISPLAY CLEAR POWER LAW BEHAVIOUR SIMILAR TO THAT SEEN IN CONVENTIONAL SUPERCONDUCTING COMPOSITE WIRES. FOR HIGHER ELECTRIC FIELDS THERE IS A DEVIATION FROM SIMPLE POWER LAW BEHAVIOUR AS CURRENT IS PROGRESSIVELY TRANSFERRED TO THE SILVER CLADDING. AN INTERPRETATION OF THE COMPLEX DEPENDENCE OF CRITICAL CURRENT ON APPLIED FIELD AND SAMPLE MICROSTRUCTURE IS GIVEN IN TERMS OF THE HYSTERETIC PROPERTIES OF A JOSEPHSON JUNCTION NETWORK MEDIATED BY TRAPPED FLUX WHICH IS RETAINED BY STRONG PINNING REGIONS.

Details

  • Original title: RELATION OF CRITICAL CURRENT IRREVERSIBILITY TO TRAPPED FLUX AND MICROSTRUCTURE IN POLYCRYSTALLINE YBACUO.
  • Record ID : 1990-0031
  • Languages: English
  • Source: Cryogenics - vol. 28 - n. 10
  • Publication date: 1988

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