Current Transport Properties of TFA-MOD Processed Long-length YxGd1-xBa2Cu3Oy Coated Conductor Doped with BaZrO3 Artificial Pinning Centers
Current Transport Properties of TFA-MOD Processed Long-length YxGd1-xBa2Cu3Oy Coated Conductor Doped with BaZrO3 Artificial Pinning Centers
复制标题
TFA-MOD 处理的长 YxGd1-xBa2Cu3Oy 涂层导体的电流传输特性，掺杂 BaZrO3 人工钉扎中心
DOI：
10.1109/tasc.2014.2387054
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Kiss
中科院分区：
文献类型：
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作者：
M. Inoue;K. Tanaka;K. Imamura;K. Higashikawa;K. Kimura;Y. Takahashi;T. Koizumi;T. Hasegawa;S. Awaji;K. Watanabe;M. Yoshizumi;T. Izumi;T. Kiss
研究了间歇炉法制备的掺杂纳米BaZrO_3人工钉扎中心(APC)的TFA-MOD YxGd1-xBa2Cu3Oy(YGdBCO)涂层导体(CC)的电流输运特性。与以前的YGdBCO连铸工艺相比，本工艺不仅在高温下，而且在低温区对改善连铸的载流性能都是非常有效的，例如，ICAT 4.2K和17T为450A/cm-w，即工程Jcis 4.3×108A/m2，这与4.2K下的Nb3Sn线相当。此外，Icc的角度依赖关系清楚地表明了APC的有效性。也就是说，77K时，整个角区的最小Ic值从7A/cm-w增加到35A/cm-w，Icis的各向异性减小。我们还将讨论基于渗流跃迁模型和磁通钉扎标度律的场内电流输运性质的解析表达式。利用这种分析方法，可以描述任意温度和磁场条件下的电场-电流密度特性，并可以估计J_c的统计分布。这些结果不仅对使用CCS的超导器件的设计有重要意义，而且对理解钉扎特性也是重要的。
We have investigated the current transport properties of batch furnace processed TFA-MOD YxGd1-xBa2Cu3Oy(YGdBCO) coated conductor (CC) doped with nanoscale BaZrO3artificial pinning centers (APCs). As the comparison with those of previous processed YGdBCO CC, it has been confirmed that the present process is very effective to improve current carrying performance of the CC at not only high-temperature but also low-temperature region, for example, the Icat 4.2 K and 17 T is 450 A/cm-w, i.e., the engineering Jcis 4.3 × 108A/m2, which is comparable value to that of Nb3Sn wire at 4.2 K. In addition, angular dependences of the Icclearly show the effectiveness of the APCs. Namely, the minimum Icin the whole angle region at 77 K, 3 T increase from 7 to 35 A/cm-w, and the anisotropy of Icis reduced. We will also discuss the analytical expression of in-field current transport property based on the percolation transition model and the scaling law of the flux pinning. By using this analysis, electric field versus current density characteristics in arbitrary conditions of temperature and magnetic field can be described, and also, the statistical distribution of Jccan be estimated. These results are important not only for the design of superconducting devices using CCs but also for understanding the pinning properties.