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Advanced Physics Laboratories

       
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High Temperature Superconductors

ABOUT THE EXPERIMENT
We will measure the transition to the superconducting state in YBCO superconductor samples (Tc = 92K), using the Meissner effect (magnetic levitation) as well as the total disappearance of the electrical resistance. We will also measure the inverse Josephson Effect in which the coherent ground-state wavefunction of the superconducting state manifests itself macroscopically as a dc voltage.
WHAT YOU WILL LEARN
  • Experience with Liquid Nitrogen and cryo
  • Introduction to superconductivity¬†
  • Introduction to the Josephson Effect
PREPARATION
  • Review cryo safety and discuss with instructor
  • Laboratory Procedure
  • "Experiment Guide for Superconductor Demonstrations" by Colorado Superconductors, Inc.
  • Recommended reading:
    • "Introduction to Superconductivity"
      by Alistair C. Rose-Innes
OTHER DOCUMENTATION
  • Under construction