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首页> 外文期刊>Physica, C. Superconductivity and its applications >Interfacial reactions of Ba2YCu3O6+z with coated conductor buffer layer, LaMnO3
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Interfacial reactions of Ba2YCu3O6+z with coated conductor buffer layer, LaMnO3

机译：Ba2YCu3O6 + z与涂覆的导体缓冲层LaMnO3的界面反应

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摘要

Chemical interactions between the Ba2YCu3O6+x superconductor and the LaMnO3 buffer layers employed in coated conductors have been investigated experimentally by determining the phases formed in the Ba2YCu3O6+ x–LaMnO3 system. The Ba2YCu3O6+x–LaMnO3 join within the BaO–(Y2O3–La2O3)–MnO2–CuOx multi-component system is non-binary. At 810 C (pO2 = 100 Pa) and at 950 C in purified air, four phases are consistently present along the join, namely, Ba2x(La1+xyYy)Cu3O6+z, Ba(Y2xLax)CuO5, (La1Yx)MnO3, (La,Y)Mn2O5. The crystal chemistry and crystallography of Ba(Y2xLax)CuO5 and (La1xYx)Mn2O5 were studied using the X-ray Rietveld refinement technique. The Y-rich and La-rich solid solution limits for Ba(Y2xLax)CuO5 are Ba(Y1.8La0.2)CuO5 and Ba(Y0.1La1.9)CuO5, respectively. The structure of Ba(Y1.8La0.2)- CuO5 is Pnma (No. 62), a = 12.2161(5) A b = 5.6690(2) A, c = 7.1468(3) A, V = 494.94(4) A3, and Dx = 6.29 g cm3. YMn2O5 and LaMn2O5 do not form solid solution at 810 C (pO2 = 100 Pa) or at 950 C (in air). The structure of YMn2O5 was confirmed to be Pbam (No. 55), a = 7.27832(14) A, b = 8.46707(14) A, c = 5.66495(10) A, and V = 349.108(14) A3. A reference X-ray pattern was prepared for YMn2O5.
机译：通过确定Ba2YCu3O6 + x–LaMnO3系统中形成的相，已对Ba2YCu3O6 + x超导体与LaMnO3缓冲层（用于涂层导体）之间的化学相互作用进行了实验研究。 BaO-（Y2O3-La2O3）-MnO2-CuOx多组分体系中的Ba2YCu3O6 + x-LaMnO3是非二元体系。在810 C（pO2 = 100 Pa）和950 C的纯净空气中，沿连接处始终存在四个相，即Ba2x（La1 + xyYy）Cu3O6 + z，Ba（Y2xLax）CuO5，（La1Yx）MnO3，（ La，Y）Mn2O5。利用X射线Rietveld精炼技术研究了Ba（Y2xLax）CuO5和（La1xYx）Mn2O5的晶体化学和晶体学。 Ba（Y2xLax）CuO5的富Y和富La固溶极限分别为Ba（Y1.8La0.2）CuO5和Ba（Y0.1La1.9）CuO5。 Ba（Y1.8La0.2）-CuO5的结构为Pnma（No. 62），a = 12.2161（5）A b = 5.6690（2）A，c = 7.1468（3）A，V = 494.94（4） A3，Dx = 6.29 g cm3。 YMn2O5和LaMn2O5在810 C（pO2 = 100 Pa）或950 C（在空气中）不会形成固溶体。确认YMn2O5的结构为Pbam（No. 55），a = 7.27832（14）A，b = 8.46707（14）A，c = 5.66495（10）A，V = 349.108（14）A3。为YMn2O5准备了参考X射线图。

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