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Superconductivity refers to the phenomenon of zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled to cryogenic temperatures. It represents a state of matter where electrical current can flow without dissipation, enabling highly efficient power transmission and strong magnetic fields. In the context of Science/Physics/Magnetism, superconductivity explores the interplay between magnetic interactions, quantum mechanics, and material properties at extremely low temperatures, leading to unique phenomena such as the Meissner effect and flux quantization. Research in this area seeks to understand, optimize, and apply superconducting materials for various technological applications, including energy storage, medical imaging, and quantum computing.