Syntheses of the \(Y_3Ba_5Cu_8O_{18\pm \delta }\) (noted Y-358) +x wt.% TiO₂ (x = 0.00, 0.10, 0.30, 0.50 and 0.60 wt%) bulk superconducting material are prepared by the standard solid-state reaction process. Then, systematic electrical conductivity fluctuation in normal and superconducting state analyses on the samples is reported. X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to systematically assess stage formation and microstructures of the samples. XRD with the Rietveld refinement procedure showed that by cumulating the amount of TiO₂ nanoparticle into Y358 substance, the crystal lattice constants altered slightly and the orthorhombicity reduced compared to the pure sample. The impact of TiO₂ adding upon the superconducting characteristics with critical temperatures T_c analysis showed that as the inclusion of TiO₂ nanoparticles content increases the critical temperatures are enhanced for all of the doped samples. Evaluations of excess conductivity fluctuation were conducted by Aslamazov–Larkin (AL) model. Inside the grains, dimensional fluctuation is depending on the Lawrence–Doniach (LD) temperature named \(T_{LD}\). This parameter (\(T_{LD}\)) was increased in the mean-field area by rising TiO₂ in Y358 substance compared to the non-added sample. However, analysing the excess conductivity based on the AL concept leads to the determination of thermodynamic fluctuation and some parameters values such as the critical temperature \((T_{c\ zero})\), coherence length \(\xi _c(0)\), super-layer length d, critical magnetic fields \(B_{c1}(0)\), \(B_{c2}(0)\) and critical current density \(J_c(0)\). These parameters which are significant by the TiO₂ nanoscale doping show that the theory outlined in the chapter “Excess conductivity model” is sufficient to describe our results.

所述的合成\（Y_3Ba_5Cu_8O_ {18 \时\增量} \） （注意Y型358）+ X重量％的TiO ₂（X = 0.00，0.10，0.30，0.50和0.60重量％）散装超导材料是由制备标准的固态反应过程。然后，报告了样品的正常和超导状态分析中的系统电导率波动。X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 用于系统地评估样品的阶段形成和微观结构。XRD 与 Rietveld 精修程序表明，通过将 TiO ₂纳米颗粒的量累积到 Y358 物质中，与纯样品相比，晶格常数略有改变，正交性降低。TiO ₂的影响添加具有临界温度T _c的超导特性的分析表明，随着 TiO ₂纳米颗粒含量的增加，所有掺杂样品的临界温度都提高。过度电导率波动的评估是通过 Aslamazov-Larkin (AL) 模型进行的。在晶粒内部，尺寸波动取决于名为\(T_{LD}\)的 Lawrence-Doniach (LD) 温度。该参数 ( \(T_{LD}\) ) 在平均场面积中通过 TiO _{2 的}增加而增加在 Y358 物质中与未添加的样品相比。然而，基于 AL 概念分析过量电导率导致确定热力学波动和一些参数值，例如临界温度\((T_{c\ zero})\)，相干长度\(\xi _c(0) \)、超层长度d、临界磁场\(B_{c1}(0)\)、\(B_{c2}(0)\)和临界电流密度\(J_c(0)\)。这些对 TiO ₂纳米级掺杂很重要的参数表明，“过度电导率模型”一章中概述的理论足以描述我们的结果。