Large enhancement of the in-field critical current density of YBCO coated conductors due to composite pinning landscape
Large enhancement of the in-field critical current density of YBCO coated conductors due to composite pinning landscape
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由于复合钉扎景观，YBCO 涂层导体的现场临界电流密度大大提高
DOI：
10.1088/1361-6668/ab9f64
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发表时间：
2020
影响因子：
3.6
通讯作者：
Laviano, F.
中科院分区：
文献类型：
--
作者：
Kihlstrom, K. J.;Civale, L.;Eley, S.;Miller, D. J.;Welp, U.;Kwok, W. K.;Niraula, P.;Kayani, A.;Ghigo, G.;Laviano, F.
YBa2Cu3O7基涂层导体(CCS)在已知的超导体中具有最高的临界电流密度(Jc)，是旋转机械、高场磁体和电力传输等应用的关键技术。加入纳米非超导第二相作为附加的涡钉扎中心被认为是在工业规模上进一步提高Jc的最可行的途径，并已成功地应用于商业CCS。由此产生的钉扎环境相当复杂，各种类型的缺陷之间既有协同作用，也有竞争作用。另一方面，粒子辐照允许对明确定义的缺陷形态进行受控的后处理。我们之前已经证明，在商用最先进的CCS中，质子和其他轻离子的照射可以进一步提高场强Jc。在这里，我们开发了一种联合辐射过程，它将Jc提高到以前只用一种物种照射所达到的值以上。我们的新方法包括顺序地照射250 MeV的Au离子和4 MeV的质子。例如，在旋转机器应用的感兴趣区域T∼27K(液体霓虹灯)和µ0 H∼4T上，我们获得了J c∼5 MA cm−2，这比单独照射产生的值高出约40%。最后，我们得出结论，这是由于引入的张开的、非均匀的柱状缺陷和小团簇的协同钉扎效应。
YBa 2 Cu 3 O 7-based coated conductors (CCs) achieve the highest critical current densities (J c) of any known superconductor and are a key technology for applications such as rotatory machines, high-field magnets and power transmission. Incorporation of nano-sized non-superconducting second phases as additional vortex pinning centers has been considered the most amenable route to further enhance J c at an industrial scale, and has been successfully used in commercial CCs. The resulting pinning landscape is quite complex, with both synergistic and competing interactions among the various types of defects. Particle irradiation, on the other hand, allows for a controlled post-processing incorporation of a well-defined defect morphology. We have previously shown that irradiation with protons and other light ions can further enhance the in-field J c in commercial state-of-the-art CCs. Here we develop a combined irradiation process that increases J c above values previously achieved by irradiating with only one species. Our new approach involves sequentially irradiating with 250 MeV Au ions and 4 MeV protons. For example, at T∼ 27 K (liquid neon) and µ 0 H∼ 4 T, a region of interest for rotatory machines applications, we obtain J c∼ 5 MA cm− 2, which is about 40% higher than the values produced by the individual irradiations. Finally, we conclude that this is due to the synergistic pinning effects of the introduced splayed, non-uniform columnar defects and small clusters.
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具有柱状缺陷的 YBa 2 Cu 3 O 7 − δ 中双扭结的非玻璃态弛豫
影响因子：
3.7
作者：
D. Niebieskikwiat;L. Civale;C. Balseiro;G. Nieva
通讯作者：
G. Nieva
影响因子：
3.6
作者：
Ghigo, G.;Laviano, F.;Gozzelino, L.
通讯作者：
Gozzelino, L.
涡流固相在高密度纳米颗粒的添加中向上移动。
影响因子：
4.6
作者：
Miura M;Maiorov B;Balakirev FF;Kato T;Sato M;Takagi Y;Izumi T;Civale L
通讯作者：
Civale L
YBa2Cu3O7-x 单晶中电子辐照产生和识别通量钉扎缺陷。
DOI：
10.1103/physrevb.45.10677
发表时间：
1992
期刊：
Physical review. B, Condensed matter
影响因子：
--
作者：
J. Giapintzakis;Wei‐Cheng Lee;J. Rice;D. Ginsberg;I. Robertson;R. Wheeler;M. Kirk;M. Ruault
通讯作者：
M. Ruault
质子辐照单晶 Ba2YCu3O7−δ 的临界电流
影响因子：
4
作者：
R. B. Dover;E. Gyorgy;A. White;L. Schneemeyer;R. J. Felder;J. Waszczak
通讯作者：
J. Waszczak