Superconductivity is a phenomenon of exactly nil galvanizing resistance and expulsion of magnetic electron orbits occurring in accepted materials when cooled below a characteristic critical temperature. It was discovered by Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the super film director as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be unsounded simply as the idea
Explanation of super conductors
The electrical resistance of a metallic conductor change magnitudes gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near compulsive zero, a real sample of a normal conductor shows more or little resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current slick in a loop of superconducting wire can ply indefinitely with no power source.
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In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (?183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. facile nitrogen boils at 77 K, facilitating many experiments and applications that are less practical at lower temperatures. In conventional superconductors, electrons are held together in pairs by an attraction mediated by lattice phonons. The best available model of high-temperature superconductivity is still close to crude. There is a hypothesis that electron pairing in high-temperature superconductors is mediated by short-range spin waves known as...If you lack to get a full essay, order it on our website: Orderessay
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