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I-V curves of BSCCO tape carrying DC current exposed to perpendicular and parallel AC fields
| Content Provider | Semantic Scholar |
|---|---|
| Author | Friedman, Alexandra Wolfus, Y. Kopansky, F. Soshnikov, I. M. Roitberg, V. B. Asulay, S. Kalisky, Beena Yeshurun, Yosef |
| Copyright Year | 2005 |
| Abstract | A study of the DC I-V curves of BSCCO tapes exposed to AC perpendicular and parallel magnetic fields is presented. AC magnetic fields with amplitudes up to 700 G and frequencies from 1 to 430 Hz have been applied perpendicular and parallel to tapes carrying DC currents at T=77 K. Both field orientations result in a significant DC electric field increase, in comparison to applying DC magnetic fields of the same intensity. However, the observed I-V curves behavior is different for the perpendicular and parallel cases. In the perpendicular case, we distinguish between two frequency regimes: for frequencies above 40 Hz, the observed I-V curves obey the empirical power law dependence with current density, J/sub C/, and power index, n, that strongly depend on the field amplitude. For frequencies below 20 Hz, the observed I-V curves deviate from power law description. In the parallel field case, the I-V curve can be regarded as a superposition of an additional DC voltage over the no field I-V curve. This additional voltage increases with increasing current, peaks near the critical current and decreases thereafter. The results are discussed assuming a narrowing down of the DC current path under the application of a perpendicular AC field. Shaking of the pinned vortices under the application of a parallel AC field is assumed for explaining the results in this case. |
| Starting Page | 2891 |
| Ending Page | 2894 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1109/TASC.2005.848256 |
| Volume Number | 15 |
| Alternate Webpage(s) | https://superconductivity.biu.ac.il/files/superconductivity/shared/iv_curves_of_bscco_2005.pdf |
| Journal | IEEE Transactions on Applied Superconductivity |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
