Anomalous inversion of voltage versus current curves in ZFC and FC conditions in BSCCO ceramic superconductors
✍ Scribed by J. López; P. Muné
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 414 KB
- Volume
- 261
- Category
- Article
- ISSN
- 0921-4534
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✦ Synopsis
An anomalous inversion of the voltage versus current curves measured in zero-field cooling (ZFC) and field-cooling (FC) conditions at low applied magnetic field was found in several BSCCO (2223) ceramic superconductors. In other words, at low magnetic-field values the ZFC curves are unexpectedly below the corresponding FC ones. This is in contrast with YBCO ceramic where the order is reversed. Results are discussed in terms of intergranular critical current and the effect on the weak-link army of the internal magnetic field. Pinning energies dependences with current and magnetic field and temperature for both cooling conditions were also performed.