Strong c-axis correlated pinning and hybrid pinning in YBa2Cu3O7-δ films containing BaHfO3 nanorods and stacking faults
Strong c-axis correlated pinning and hybrid pinning in YBa2Cu3O7-δ films containing BaHfO3 nanorods and stacking faults
复制标题
含有 BaHfO3 纳米棒和堆垛层错的 YBa2Cu3O7-δ 薄膜中的强 c 轴相关钉扎和混合钉扎
DOI：
10.1088/1361-6668/aa70d3
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发表时间：
2017
影响因子：
3.6
通讯作者：
K. Matsumoto
中科院分区：
文献类型：
--
作者：
T. Horide;K. Otsubo;R. Kita;N. Matsukida;M. Ishimaru;S. Awaji;K. Matsumoto
采用脉冲激光沉积和氧气退火工艺制备的YBa 2Cu 3 O 7− δ薄膜含有细长的BaHfO 3纳米棒和层错，在40和20 K低温下获得了高临界电流密度（Jc）。YBa 2 Cu 3 O 7− δ+ BaHfO 3薄膜在40 K和20 K时的钉扎力最大值分别为312 GN m− 3和619 GN m− 3。这些Fp，最大值是可比的那些在以前报道的高J c膜几乎相同的匹配字段。因此，本研究表明YBa 2Cu 3 O 7-δ超导基体与其它REBa 2Cu 3 O 7-δ（RE= Gd，Sm，（Gd，Y））一样，在低温下实现了高Jc。此外，高的J c也得到了平行于ab-平面的磁场，表明混合钉扎的纳米棒和堆垛层错。因此，在含有纳米棒的YBa 2Cu 3 O 7− δ薄膜中，层错对Jc特性有显著影响.目前的薄膜结构具有很强的c轴相关钉扎和混合钉扎，可以有效地同时控制YBa 2Cu 3 O 7− δ薄膜的Jc值和Jc各向异性。
High critical current density (J c) was achieved in low temperatures of 40 and 20 K in YBa 2 Cu 3 O 7− δ films containing elongated BaHfO 3 nanorods and stacking faults, which were prepared using pulsed laser deposition and post-oxygen-annealing. The YBa 2 Cu 3 O 7− δ+ BaHfO 3 film exhibited global pinning force maximum (F p, max) of 312 GN m− 3 at 40 K and 619 GN m− 3 at 20 K due to strong pinning by nanorods. These F p, max values are comparable to those in the previously-reported high-J c films with almost the same matching field. Thus, the present study demonstrated that YBa 2 Cu 3 O 7− δ superconducting matrix realized high J c in low temperatures like other REBa 2 Cu 3 O 7− δ (RE= Gd, Sm,(Gd, Y)). Furthermore, high J c was obtained also for magnetic field parallel to the ab-plane, indicating hybrid pinning of nanorods and stacking faults. Thus, the stacking faults significantly affected the J c properties in the YBa 2 Cu 3 O 7− δ films containing nanorods. The present film structure with strong c-axis correlated pinning and hybrid pinning is effective in simultaneous control of J c values and J c anisotropy in YBa 2 Cu 3 O 7− δ films.