Critical Current Properties in $\hbox{REBa}_{2} \hbox{Cu}_{3}\hbox{O}_{y}$ Films With Nanorods Depending on Growth Conditions
作者： M. Haruta , A. Ichinose , N. Fujita , K. Saura , T. Maeda
DOI: 10.1109/TASC.2012.2233541
关键词: Nanorod 、 Microstructure 、 Materials science 、 Flux pinning 、 Electric field 、 Condensed matter physics 、 Percolation 、 High-temperature superconductivity 、 Type-II superconductor 、 Current density
摘要: Growth temperature (Ts) dependent microstructures of nanorods were clarified for BaNb2O6 (BNO)-doped YBa2Cu3Oy (Y123) films. The morphology BNO in the Y123 matrix was changed from fluctuated to uniform with increase Ts. Reflecting this change nanorod morphology, spatial distribution local critical current density (Jcl) determined percolation transition model became sharp Jcl led a steep slope electric field vs. curve and Jc peak under B//c magnetic angular dependence. evaluation is strong tool understand quantitatively relationship between microstructure properties RE123 films nanorods. To optimize coated conductors nanorods, precise control Ts very important production process.
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