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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Effects of Nano scale Y_2O_3 Additions on Sm-Ba-Cu-O Materials
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Effects of Nano scale Y_2O_3 Additions on Sm-Ba-Cu-O Materials

机译：纳米Y_2O_3添加对Sm-Ba-Cu-O材料的影响

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摘要

To enhance the critical current density (J_c) of Sm-Ba-Cu-O (SmBCO) superconductors, a small number of Y_2O_3 particles of nano scale (nmY_2O_3) were used. The J_c-H (the applied magnetic field) results show that the increase in J_c using nmY_2O_3 occurs mainly in high fields. In addition, by increasing the number of nmY_2O_3 particles, the flux pinning force-reduced magnetic field (F_p-h) curves shift to the right. The above results indicate the formation of δT_c pinning centers. The microstructure results show that Y_2O_3 particles react with the 211 (Sm_2BaCuO_5), 123 (Sm_1Ba_2Cu_3O_7) and liquid phases at high temperatures. Both the high solubility of Sm in the liquid and the inter-diffusion of Sm and Y at high temperatures result in compositional fluctuations [(Sm,Y)-Ba-Cu-O]. It is considered that these compositional fluctuations contribute to δT_c pinning. Finally, to determine the effect of compositional fluctuation caused by a different method, these results were also compared with those of the nano sized Y211 (nmY211)-doped samples.
机译：为了提高Sm-Ba-Cu-O（SmBCO）超导体的临界电流密度（J_c），使用了少量的纳米级Y_2O_3纳米粒子（nmY_2O_3）。 J_c-H（施加的磁场）的结果表明，使用nmY_2O_3引起的J_c的增加主要发生在高磁场中。另外，通过增加nmY_2O_3粒子的数量，磁通钉扎力减小的磁场（F_p-h）曲线向右移动。以上结果表明了δT_c钉扎中心的形成。微观结构结果表明，Y_2O_3颗粒在高温下与211（Sm_2BaCuO_5），123（Sm_1Ba_2Cu_3O_7）和液相反应。 Sm在液体中的高溶解度以及高温下Sm和Y的相互扩散都会导致成分波动[（Sm，Y）-Ba-Cu-O]。认为这些成分波动有助于δT_c钉扎。最后，为了确定由不同方法引起的成分波动的影响，还将这些结果与纳米级Y211（nmY211）掺杂样品的结果进行了比较。

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