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Ca doping of YBCO grain boundaries

机译：Ca掺杂的YBCO晶界

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Ca-gels were applied to highly dense YBCO pellets and PLD thin films followed by high temperature post-annealing. Parameters of Ca diffusion in YBCO (diffusion coefficients. activation energy, etc.) as a function of temperature and oxygen partial pressure were determined by depth profiling SIMS. Fast Ca diffusion along the grain boundaries was observed by FIB and SIMS. The effect of Ca doping on T-c and J(c) was studied by VSM. Ca distribution in the samples, induced by preferential diffusion along the grain boundaries, did not appear to change superconducting properties within the grains but showed increased J(c) across the grain boundaries. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 9]
机译：将Ca凝胶应用于高密度YBCO颗粒和PLD薄膜，然后进行高温后退火。通过深度分析SIMS确定YBCO中Ca扩散的参数（扩散系数，活化能等）与温度和氧分压的关系。通过FIB和SIMS观察到Ca沿晶界快速扩散。 VSM研究了Ca掺杂对T-c和J（c）的影响。样品中的Ca分布是由于沿晶界优先扩散而引起的，似乎没有改变晶粒内的超导性能，但在整个晶界显示出J（c）增加。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：9]

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