Magnetic levitation of superconductor

Magnetic levitation of superconductor

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Credit: US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY

Caption: Magnetic levitation of a small superconducting ceramic pellet. Superconductors are materials that have no electrical resistance. When placed in a suitably- aligned magnetic field, the sample will levitate by a process called magnetic exclusion. Some metals have this property when cooled to below 4 Kelvin (-269 Celsius) by liquid helium. Current research is toward providing materials that superconduct at higher temperatures, such as those available with liquid nitrogen (ie 63 Kelvin and higher). The ceramic seen here contains lanthanum, barium, copper and oxygen, and superconducts at about 30 Kelvin (-243 Celsius).

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Keywords: ceramic, conductance, conducting, conductivity, conductor, levitation, magnetic, magnetic levitation, magnetism, pellet, physics, superconducting, superconductivity, superconductor

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