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Pramana

, Volume 31, Issue 2, pp L147–L151 | Cite as

Grain boundary Josephson effect in constricted Bi-Sr-Ca-Cu-O

  • N D Kataria
  • V S Tomar
  • A K Gupta
  • Mukesh Kumar
Rapid Communications
  • 17 Downloads

Abstract

The current-voltage characteristics for Bi-Sr-Ca-Cu-O bulk specimen incorporating manually carved constriction show both zero voltage pair current and quasiparticle tunnelling current. The pair current amplitude modulates with applied d.c. magnetic fields. Microwave-induced Shapiro steps are clearly seen in the I-V curves. The Josephson effects arise due to the presence of arrays of grain boundary Josephson junctions.

Keywords

High temperature superconductivity Bi-Sr-Ca-Cu-O Josephson tunnelling 

PACS Nos

74.70 74.50 

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Copyright information

© the Indian Academy of Sciences 1988

Authors and Affiliations

  • N D Kataria
    • 1
  • V S Tomar
    • 1
  • A K Gupta
    • 1
  • Mukesh Kumar
    • 1
  1. 1.National Physical LaboratoryNew DelhiIndia

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