• A M Shaikh

      Articles written in Bulletin of Materials Science

    • Zero resistance states in modified Y-Ba-Cu-O system with transition temperatures above 135 K

      Y Sawan A M Shaikh

      More Details Abstract Fulltext PDF

      Superconducting transition of minor-dispersed phase in modified YBa2Cu3O7−δ samples is found to occur at around 140K. The amount of this minor phase is enough to provide zero resistivity above 135 K. The measurements of the electrical resistivity indicated that the material is stable, thermally recyclable and reproducible. X-ray analysis of the sample with the highestTc shows a major phase with perovskite-like structure witha=3·820(1) Å;b=3·873(1) Å andc=11·659(2) Å along with several unidentified weak peaks. Magnetic measurements confirmed the mixed-phase nature with diamagnetic transition temperatures at 137,91 and 86 K. The minor phase responsible for superconductivity with zero resistivity above 135 K is about 0·4% of the bulk and its nature is still unidentified. The details of the preparation and chemical modification process and the results are presented.

    • Mosaic structure and reflectivity of an as grown copper single crystal using neutron diffraction

      Mala N Rao A M Shaikh

      More Details Abstract Fulltext PDF

      A single crystal of copper of size 80 mm dia. and 50 mm length was grown by the Bridgman method. Neutron diffraction investigations were carried out to determine the mosaic spread and reflectivity of this as grown crystal. The crystal was found to be of good quality having structure free and symmetric rocking curves with mosaic spread of 14 min.arc and reflectivity of ∼ 50%.

  • 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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