Angular-dependent vortex pinning mechanism in YBa2Cu3O7-delta/YSZ quasi-multilayer

作者：Peng Lin^*; Cai Chuanbing; Chen Changzhao; Liu Zhiyong; Huehne Ruben; Holzapfel Bernhard

来源：Journal of Applied Physics, 2008, 104(3): 033920.

DOI：10.1063/1.2968235

The temperature and magnetic field dependences of anisotropic pinning contributions of YBa2Cu3O7-delta/YSZ quasi-multilayer have been investigated by the measurement of angular-dependent critical current density (J(c)). With the isotropic and anisotropic pinning contributions in a wide range of temperature, we identify the possible sources of the pinning centers and classify them into the weak and the strong flux pinning model. Angular-dependent J(c)(H,T) measurements have demonstrated that the growth control strategy is very effective in preventing the vortex motion at high fields and high temperatures. It is suggested that at high applied fields, such as 7 T, the pinning contribution of the nanostructured quasi-multilayers is dominated by the anisotropic disorders, while at intermediate-low fields (such as 1 T) the pinning contribution is determined by both isotropic and anisotropic disorders, suggesting the coexistence of isotropic and anisotropic pinning.

• 出版日期2008-8-1
• 单位上海大学