"Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material."
Explores the behavior of materials that can conduct electricity with zero resistance at low temperatures.
"Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered, even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero."
"The superconductivity phenomenon was discovered in 1911 by Dutch physicist Heike Kamerlingh Onnes."
"It is characterized by the Meissner effect, the complete cancelation of the magnetic field in the interior of the superconductor during its transitions into the superconducting state."
"An electric current through a loop of superconducting wire can persist indefinitely with no power source."
"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."
"The existence of superconductivity at higher temperatures than this (liquid nitrogen boiling at 77 K) facilitates many experiments and applications that are less practical at lower temperatures."
"The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics."
"The resistance drops abruptly to zero below the critical temperature."
"Magnetic fields are expelled from the material."
"The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics."
"An electric current through a loop of superconducting wire can persist indefinitely with no power source, which presents practical applications and possibilities for experiments."
"Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors."
"Some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C), while liquid nitrogen boils at 77 K (−196 °C)."
"Like ferromagnetism and atomic spectral lines, superconductivity is a phenomenon which can only be explained by quantum mechanics."
"Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered, even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero."
"The complete cancelation of the magnetic field in the interior of the superconductor occurs during its transitions into the superconducting state."
"The superconductivity phenomenon was discovered in 1911 by Dutch physicist Heike Kamerlingh Onnes."
"Any material exhibiting these properties is a superconductor."