Microwave properties of epitaxial MgB2 films and micro-bridges

ORAL

Abstract

The high transition temperature and simple AlB$_{2}$ structure make the MgB$_{2}$ superconductor a promising new material for application in superconducting electronic devices. In order to reach this goal, in addition to the development of MgB2 Josephson Junctions (JJ), we have explored the superconducting properties of lithographically patterned micron sized bridges in high quality epitaxial MgB2 films. These thin film micron size wire bridges show JJ characteristics. The current-voltage (I-V) characteristics show the expected JJ behavior as a function of temperature, magnetic field and microwave radiation including hysteresis. Large change in the hysteresis behavior is observed when the microwave power is varied. The large hysteretic I-V can have potential as a memory element. The details will be discussed.

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Authors

  • M.V. Costache

    Massachusetts Institute of Technology

  • G.X. Miao

    Francis Bitter Magnet Lab, MIT, Cambridge, MA, USA, MIT, Massachusetts Institute of Technology

  • J.S. Moodera

    Francis Bitter Magnet Lab, MIT, Cambridge, MA, USA, MIT, Francis Bitter Magnet Lab, MIT, Massachusetts Institute of Technology