Fabrication of superconducting YBa2Cu3O7−x delay lines by a chemically modified sol-gel method
Fabrication of superconducting YBa2Cu3O7−x delay lines by a chemically modified sol-gel method
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DOI：
10.1016/j.ceramint.2014.10.013
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发表时间：
2015-03
影响因子：
5.2
通讯作者：
Jiqiang Jia;Gaoyang Zhao;L. Lei;Qiushi Huang;Lukai Liu
中科院分区：
文献类型：
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作者：
Jiqiang Jia;Gaoyang Zhao;L. Lei;Qiushi Huang;Lukai Liu
利用YBa2Cu3O7−x(YBCO)凝胶薄膜的光敏性，在1英寸衬底上制备了YBCO超导延迟线。采用化学修饰的Sol-Gel工艺制备LaAlO_3(LaO)单晶衬底。激光共聚焦扫描显微镜(LCSM)和X射线衍射(XRD)分析表明，所制备的YBCO延迟线具有良好的结构和强烈的c轴取向。用低温超导测试仪和网络分析仪测量了样品的超导电性和延迟特性，结果表明，所制备的延迟线具有良好的超导电性，78℃时的临界转变温度(TC)为91℃，转变宽度(ΔT)为1.2K，临界电流密度(Jc)为1.4×106A/cm2。测得延迟线的延迟时间约为8.6 ns。
Utilizing the photosensitivity of YBa2Cu3O7−x(YBCO) gel films, superconducting YBCO delay lines were fabricated on 1 in. LaAlO3(LAO) single crystalline substrates by a chemically modified sol-gel process. Laser confocal scanning microscopy (LCSM) and X-ray diffraction (XRD) analyses of the prepared YBCO delay lines revealed a well-defined structure and a strong c-axis orientation. The superconductivity and delay properties were measured using a low-temperature superconducting tester and network analyzer, showing that the resulting delay lines have excellent superconductivity properties with a high critical transition temperature (Tc) of 91 K, a transition width (ΔT) of 1.2 K and a critical current density (Jc) of 1.4×106A/cm2at 78 K, and the superconductivity properties were not affected by using the novel chemically modified sol-gel method. The measured delay time of the delay line was about 8.6 ns.