Properties of SuperconductorsPublished on 24/2/2012 and last updated on Wednesday 16th of May 2018 at 07:48:23 PM
The superconducting material shows some extraordinary properties which make them very important for modern technology. The research is still going on to understand and utilise these extraordinary properties of superconductors in various fields of technology. Such properties of superconductors are listed below-Please Rate this Article
- Zero Electric Resistance (Infinite Conductivity)
- Meissner Effect: Expulsion of magnetic field
- Critical Temperature/Transition Temperature
- Critical Magnetic Field
- Persistent Currents
- Josephson Currents
- Critical Current
Zero Electric Resistance or Infinite ConductivityIn Superconducting state, the superconducting material shows the zero electric resistance (infinite conductivity). When the sample of a superconducting material is cooled below its critical temperature/transition temperature, its resistance reduces suddenly to zero. For example Mercury shows zero resistance below 4k.
Meissner Effect (Expulsion of Magnetic Field)A Superconductor, when it is cooled below the critical temperature Tc), expel the magnetic field and doesn't allow the magnetic field to penetrate inside it. This phenomenon in superconductors is called Meissner effect. The meissner effect is shown in figure below-
Critical Temperature/Transition TemperatureCritical temperature of a superconducting material is the temperature at which the materials changes from normal conducting state to superconducting state. This transition from normal conducting state (phase) to superconducting state (phase) is sudden / sharp and complete. The transition of mercury from normal conducting state to superconducting state is shown in figure below.