원문정보
초록
영어
We studied the distribution of the current density and its magnetic-field dependence in GdBCO coated conductors with AC bias currents using low temperature scanning Hall probe microscopy. We selectively measured magnetic field profiles from AC signal obtained by Lock-in technique and calculated current distributions by inversion calculation. In order to confirm the AC measurement results, we applied DC current corresponding to RMS value of AC current and compared distribution of AC and DC transport current. We carried out the same measurements at various external DC magnetic fields, and investigated field dependence of AC current distribution. We notice that the AC current distribution unaffected by external magnetic fields and preserved their own path on the contrary to DC current.
목차
1. INTRODUCTION
2. EXPERIMENTAL PROCEDURES
2.1. Samples
2.2. Measurement technique
3. EXPERIMENTAL RESULTS
3.1. Temperature dependence of resistivity
3.2 Comparison between DC and AC current density distribution
3.3 Field dependence of AC current distribution
4. CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES