Critical current density above 15MAcm-2 at 30K, 3T in 2.2μm thick heavily-doped (Gd,Y) Ba2Cu3Ox superconductor tapes
Critical current density above 15MAcm-2 at 30K, 3T in 2.2μm thick heavily-doped (Gd,Y) Ba2Cu3Ox superconductor tapes
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DOI：
10.1088/0953-2048/28/7/072002
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发表时间：
2015-07-01
影响因子：
3.6
通讯作者：
Galstyan, E.
中科院分区：
文献类型：
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作者：
Selvamanickam, V.;Gharahcheshmeh, M. Heydari;Galstyan, E.
在30 K、3 T下，在2.2 μ m厚的（Gd，Y）BaCuO薄膜中，加入20 mol% Zr，在平行于c轴的磁场方向（B平行于c轴）上，获得了3963 A/12 mm的临界电流（I-c）值，对应于15 MA cm（-2）的临界电流密度（J（c））。该Jc水平比添加7.5摩尔% Zr的带材的Jc值高四倍以上，所述添加7.5摩尔% Zr的带材的Jc值是工业基准。在40 K、50 K和65 K下，在平行于c轴的3 T磁场中，2.2 μ m厚、20mol%Zr的带材的临界电流值分别达到2833 A/12 mm（10.1MA cm（-2））、1881 A/12 mm（7.1MA cm（-2））和805 A/12 mm（3.1MA cm（-2））。由于在整个膜厚度上保持BaZrO 3纳米柱沿着c轴的强排列，因此这种高临界电流值是可能的。
A critical current (I-c) value of 3963 A/12 mm, corresponding to a critical current density (J(c)) of 15 MA cm(-2) has been achieved at 30 K, 3 T in the orientation of field parallel to the c-axis (B parallel to c) in 2.2 mu m thick film (Gd,Y) BaCuO tapes with 20 mol% Zr addition made by metal organic chemical vapor deposition. This Jc level is more than a factor of four higher than the Jc values of 7.5 mol% Zr-added tapes, which are an industry benchmark. The critical current values in a magnetic field of 3 T parallel to the c-axis in the 2.2 mu m thick, 20 mol% Zr-added tape reached 2833 A/12 mm (10.1MA cm(-2)), 1881 A/12 mm (7.1MA cm(-2)) and 805 A/12 mm (3.1 MA cm(-2)) at 40 K, 50 K and 65 K respectively. Such high critical current values were possible because of maintaining a strong alignment of BaZrO3 nanocolumns along the c-axis over the entire film thickness.