chapter  1
21 Pages

Introduction to Superconductivity

The universally known fact about superconductivity is that below some characteristic transition temperature (T c) many metals exhibit a complete lack of electrical resistance to a flow of direct current. Such a lossless ‘supercurrent’ can be set up around a closed loop of superconducting wire, there being no detectable decay with time (with a half-life shown experimentally to be at least 106 years).