Strong flux pinning enhancement in YBa2Cu3O7−x films by embedded BaZrO3 and BaTiO3 nanoparticles
Strong flux pinning enhancement in YBa2Cu3O7−x films by embedded BaZrO3 and BaTiO3 nanoparticles
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DOI：
10.1088/1674-1056/22/7/077401
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发表时间：
2013-07
影响因子：
1.7
通讯作者：
F. Ding;H. Gu;Teng Zhang;W. Hongyan;F. Qu;Qingquan Qiu;Shaotao Dai;X. Peng
中科院分区：
文献类型：
--
作者：
F. Ding;H. Gu;Teng Zhang;W. Hongyan;F. Qu;Qingquan Qiu;Shaotao Dai;X. Peng
采用三氟乙酸盐金属有机沉积法（TFA-MOD）制备了嵌入BaZrO 3和BaTiO 3纳米颗粒的YBa 2Cu 3 O 7 −x（YBCO）薄膜。X射线衍射和透射电子显微镜表明，这些BaZrO 3和BaTiO 3纳米粒子具有随机取向，并随机分布在YBCO基体。BaZrO 3/BaTiO 3掺杂的YBCO薄膜的临界电流密度（Jc）提高，而临界转变温度（Tc）保持在接近纯YBCO薄膜的临界转变温度（Tc）。这些结果表明，BaZrO 3和BaTiO 3纳米粒子提供了强的磁通钉扎在YBCO薄膜。
YBa2Cu3O7−x (YBCO) films with embedded BaZrO3 and BaTiO3 nanoparticles were fabricated by metalorganic deposition using trifluoroacetates (TFA-MOD). Both X-ray diffraction and transmission electron microscopy revealed that these BaZrO3 and BaTiO3 nanoparticles had random orientations and were distributed stochastically in the YBCO matrix. The unique combined microstructure enhances the critical current density (Jc) of the BaZrO3/BaTiO3 doped-YBCO films, while keeping the critical transition temperature (Tc) close to that in the pure YBCO films. These results indicate that BaZrO3 and BaTiO3 nanoparticles provide strong flux pinning in YBCO films.