
A researcher at the University of Tsukuba has offered a new explanation for how superconductors exposed to a magnetic field can recover — without loss of energy — to their previous state after the field is removed. This work may lead to a new theory of superconductivity and a more eco-friendly electrical distribution system.
Superconductors are a class of materials with the amazing property of being able to conduct electricity with zero resistance. In fact, an electrical current can circle around a loop of superconducting wire indefinitely. The catch is that these materials must be kept very cold, and even so, a strong magnetic field can cause a superconductor to revert back to normal.
It was once assumed that the superconducting-to-normal transition caused by a magnetic field c...
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