Enhanced Jc properties in superconducting NbTi composites by introducing Nb artificial pins with a layered structure
Enhanced Jc properties in superconducting NbTi composites by introducing Nb artificial pins with a layered structure
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通过引入层状结构的 Nb 人工针增强超导 NbTi 复合材料的 Jc 性能
DOI：
10.1063/1.110896
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发表时间：
1994
影响因子：
4
通讯作者：
T. Matsushita
中科院分区：
文献类型：
--
作者：
K. Matsumoto;Hirokazu Takewaki;Yasuzo Tanaka;O. Miura;K. Yamafuji;K. Funaki;M. Iwakuma;T. Matsushita
高临界电流密度（5t， 4.2 K时为4250 A/mm2, 2t， 4.2 K时为15000 A/mm2）通过在NbTi复合超导体（具有圆形截面）中使用由随机取向的Nb/NbTi多层层簇组成的人工设计引脚结构实现。当Nb层厚度约为NbTi中相干长度的两倍时，得到了最大值，其中层厚度是传统NbTi体系中优化的α - Ti带厚度的5 ~ 10倍。
High critical current densities (4250 A/mm2 at 5 T, 4.2 K, and 15 000 A/mm2 at 2 T, 4.2 K) were achieved by using an artificially designed pin structure composed of randomly oriented clusters of Nb/NbTi multilayer in a NbTi composite superconductor (with a round cross section). The maximum values were obtained when the Nb layer thickness was designed to be approximately twice the coherence length in NbTi, where the layer thickness is five to ten times thicker than that of the optimized α‐Ti ribbon thickness in a conventional NbTi system.