Strong enhancement flux pinning in MOD-YBa2Cu3O7-x, films with self-assembled BaTiO3 nanocolumns
Strong enhancement flux pinning in MOD-YBa2Cu3O7-x, films with self-assembled BaTiO3 nanocolumns
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DOI：
10.1016/j.apsusc.2014.06.110
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发表时间：
2014-09-30
影响因子：
6.7
通讯作者：
Cao, Jiang-Li
中科院分区：
文献类型：
--
作者：
Ding, Fazhu;Gu, Hongwei;Cao, Jiang-Li
采用金属有机物沉积法（MOD）在（0 0 l）取向的LaAlO 3衬底上制备了BaTiO 3纳米柱结构的YBCO薄膜。在77 K和自电场条件下，自组装BaTiO_3纳米柱掺杂YBCO薄膜的临界电流密度（J（c））高达10 MA/cm（2）。这些BaTiO 3纳米柱没有择优取向，随机分布在YBCO基体中。BaTiO 3-YBCO复合薄膜的临界电流密度在较宽的磁场范围内都有所提高，这表明这种独特的自组装结构在YBCO薄膜中提供了较强的涡旋钉扎。(C)© 2014 Elsevier B. V.保留所有权利。
YBCO thin films with BaTiO3 nanocolumns were fabricated on (0 0 l) oriented LaAlO3 substrates by metal-organic deposition (MOD). High critical current density (J(c)) up to 10 MA/cm(2) has been observed on these self-assembled BaTiO3 nanocolumns doped YBCO films at 77K and self-field. These BaTiO3 nanocolumns had no preferential orientation and were distributed randomly in the YBCO matrix. And an improved critical current density over a wide range of magnetic field in the BaTiO3-YBCO composite films were found, which implies that this unique self-assembled microstructure provided strong vortex pinning in YBCO films. (C) 2014 Elsevier B.V. All rights reserved.