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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/014/04/1125-1129

    • Keywords

       

      dc-SQUID behaviour; break junction; Josephson effect

    • Abstract

       

      Break junctions of Y-Ba-Cu-O superconductor were realized by creating fresh crack in the bar shape bulk samples mounted in a specially designed probe kept in the liquid nitrogen bath. While the bulk sample was kept static, a sharp tip of a shaft was moved downward from the outside of the dewar in order to break the sample. It was possible to change the critical current of the break junctions by adjusting pressure on the tip of the shaft. The effects of magnetic field and microwave power on the I-V characteristic of the junction were studied. The junction was found to show periodic V-B behaviour and the microwave-induced Shapiro steps were clearly observed at 77 K. The flux noise spectrum of the junction was also studied.

    • Author Affiliations

       

      S K Arora1 A K Gupta1 Neeraj Khare1 N D Kataria1 G S N Reddy1 V N Ojha1 V S Tomar1

      1. Cryogenics Division, National Physical Laboratory, Dr K S Krishnan Road, New Delhi - 110012, India

    • Dates

       
      Published
      August 1991

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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