TY - JOUR
T1 - Local resistivity as an evaluation tool for thickness dependence of critical current density in YBa2Cu3O7-x coated conductors
AU - Jo, W.
AU - Hammond, R. H.
AU - Beasley, M. R.
N1 - Funding Information:
We acknowledge the support of the DoD/Air Force MURI under University of Wisconsin Air Force grant F49620-01-1-0464, Stanford University subgrantee #412F064.
PY - 2004/10
Y1 - 2004/10
N2 - We report depth profiling of the critical current density and resistivity of YBa2Cu3O7-x films grown by in situ electron beam evaporation. The method is capable of providing important information on the uniformity of the films, and on the commonly observed property that the critical currents in high temperature superconductor coated conductors do not scale linearly with thickness. Local critical current density shows a clear correlation with local resistivity. Homogeneous transport properties with a large critical current density (4-5 MA/cm2 at 77 K, 0 T) are observed in top faulted region while it is found that the bottom part carries little supercurrent with a large local resistivity. Therefore, it is possible that thickness dependence of critical current density is closely related with a topological variation of good superconducting paths and/or grains in the thin film bodies. The information derived from it may be useful in the characterization and optimization of superconducting thin films for electrical power and other applications.
AB - We report depth profiling of the critical current density and resistivity of YBa2Cu3O7-x films grown by in situ electron beam evaporation. The method is capable of providing important information on the uniformity of the films, and on the commonly observed property that the critical currents in high temperature superconductor coated conductors do not scale linearly with thickness. Local critical current density shows a clear correlation with local resistivity. Homogeneous transport properties with a large critical current density (4-5 MA/cm2 at 77 K, 0 T) are observed in top faulted region while it is found that the bottom part carries little supercurrent with a large local resistivity. Therefore, it is possible that thickness dependence of critical current density is closely related with a topological variation of good superconducting paths and/or grains in the thin film bodies. The information derived from it may be useful in the characterization and optimization of superconducting thin films for electrical power and other applications.
KW - Coated conductor
KW - Critical current density
KW - Thickness dependence
UR - http://www.scopus.com/inward/record.url?scp=4644341712&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2004.01.125
DO - 10.1016/j.physc.2004.01.125
M3 - Article
AN - SCOPUS:4644341712
SN - 0921-4534
VL - 412-414
SP - 1030
EP - 1035
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SPEC. ISS.
ER -