Oxygen mobility, high temperature superconductors

The high oxygen diffusivity, even at room temperature, of the 90 K high-temperature superconductor YBayCusOy s (0 < 5 < 1) is one of its remarkable properties. The large concentration of anion vacancies of the perovskite-related structure (i.e. A3B3O9 2) is responsible for the high mobility of this phase. 

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