Precipitation from Gd1+xBa2-xCu3O7 superconductor in low oxygen partial pressure

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作者：

Iowa State Univ, Iowa, United States ^{[1
]}

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来源：

IEEE Trans Appl Supercond | / 2 pt 2卷 / 1731-1734期

关键词：

Critical current density (superconductivity) - Gadolinium compounds - Magnetic field effects - Precipitation (chemical) - Solid solutions - Solubility - Superconducting transition temperature;

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摘要：

Precipitation behavior of second phases from Cd1+xBa2-xCu3O7 solid solution was studied by processing in low oxygen partial pressure. With the decrease of solid solubility in the low oxygen partial pressure, Gd2BaCuO5 and CuO were precipitated from the solid solution as second phases. This resulted in an increase in the superconducting transition temperature up to that of GdBa2Cu3O7 and an enhancement in the critical current density. The amount and size of the second phases can be controlled by the oxygen partial pressure, processing temperature and the starting composition, thus providing a useful method to introduce flux pinning centers for the improvement of critical current density.

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