Improvement of critical current properties for nano-defects-doped high-Tc superconducting films by controlling charier density

为了制备在77 K磁场下具有高临界电流密度（Jc）的稀土（RE）基高Tc超导（RE 123）薄膜，在RE 123薄膜中引入纳米棒作为柱状缺陷。临界电流特性依赖于Ts，并阐明了Jc特性与纳米棒形貌的关系。根据超导基质的组成，Jc特性的Ts依赖性是不同的。此外，Ts独立的Jc性能实现了由两种不同类型的RE的混合物作为RE 123矩阵使用纳米棒掺杂的RE 123薄膜。

To fabricate rare-earth (RE) based high-Tc superconducting (RE123) films with high critical current density (Jc) under magnetic fields at 77 K, nanorods as columnar defects were introduced into the RE123 films. Critical current properties depended on Ts, and the relationship between Jc properties and morphology of nanorods were clarified. The Ts dependences of Jc properties were different according to the composition of the superconducting matrix. Moreover, Ts-independent Jc properties were achieved by the mixture of two different types of RE as the RE123 matrix using nanorod-doped RE123 films.