Roles of electron mean free path and flux pinning in optimizing the critical current in YBCO superconductors




Paturi Petriina, Huhtinen Hannu

PublisherIOP Publishing Ltd

2022

Superconductor Science and Technology

SUPERCONDUCTOR SCIENCE & TECHNOLOGY

SUPERCOND SCI TECH

065007

35

6

9

0953-2048

DOIhttps://doi.org/10.1088/1361-6668/ac68a5(external)

https://iopscience.iop.org/article/10.1088/1361-6668/ac68a5(external)

https://research.utu.fi/converis/portal/detail/Publication/175159420(external)



We present a way to reach the maximum possible critical current density, J(c), for YBa2Cu3O6+x (YBCO) thin films. This value is found to be around ten times the currently reached values. It is found that the J(c)(0 T) is governed by the mean free path of the electrons, as is the critical temperature, T-c. The J(c) in field, on the other hand, is governed by flux pinning sites and can be enhanced by optimizing the size and distribution of the non-superconducting nanoinclusions. By optimizing both the mean free path and the pinning structure, the maximum values can be reached.

Last updated on 2024-26-11 at 12:24