• A K Majumdar

      Articles written in Pramana – Journal of Physics

    • Indigenous design and fabrication of a 6.5 T superconducting magnet and a magnetotransport measurement set-up

      P Khatua A K Majumdar

      More Details Abstract Fulltext PDF

      A low-cost apparatus for measuring Hall effect and magnetoresistance is designed and built indigenously. This includes a 6.5 T superconducting magnet and a variable temperature sample holder assembly. A superinsulated liquid helium dewar with a low liquid helium boil-off rate is chosen as the low-temperature bath for doing magnetotrans-port measurements. A pair of high-$T_{c}$ superconducting leads for energizing the magnet reduces the liquid helium consumption further and makes it economically beneficial, especially for laboratories with limited budget. The performance of the apparatus is tested over a wide range of temperatures (4.2 to 300 K) and fields up to 6.5 T. Reproducible magnetotransport data are obtained with excellent temperature and field stability.

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