Abstract
Abstract Unlike YBa2Cu3O7+δ which forms only a stoichiometric compound, the light rare earth (LRE) elements form a solid solution of LRE1+xBa2−xCu3O7+δ (LRE123ss) with increasing substitution of the rare earth for Ba2+ as the ionic radii of the rare earth increases. The effects of oxygen partial pressure (Po2) on the solubility limits of LRE123ss (LRE=Pr, Nd, Sm, Eu, and Gd) were studied by differential thermal analysis, X-ray diffraction and measurement of superconducting transition temperature (Tc). An understanding the Po2 and temperature dependence of the solubility limits will not only provide guidelines for obtaining high Tc in LRE123ss but also clarify the flux pinning mechanism in these systems.
Published Version
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