Influence of twins on the critical current in YBaCuO single crystals
| Autor: | V. I. Nikitenko, A.A. Polyanskii, L.A. Dorosinskii, V.K. Vlasko-Vlasov |
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| Rok vydání: | 1994 |
| Předmět: |
Materials science
Condensed matter physics Energy Engineering and Power Technology Condensed Matter Physics Magnetic flux Electronic Optical and Magnetic Materials Exponential function Character (mathematics) Condensed Matter::Superconductivity Macle Critical current Electrical and Electronic Engineering Crystal twinning Single crystal Value (mathematics) |
| Zdroj: | Physica C: Superconductivity. 219:81-86 |
| ISSN: | 0921-4534 |
| Popis: | Induction profiles in an inhomogeneously twinned YBa 2 Cu 3 O 7-δ single crystal were measured using a recently developed magneto-optic technique. The critical current value J c was derived from these profiles and temperature dependences of J c for twinned and untwinned regions were built. Twin boundaries are shown to contribute essentially to pinning at temperatures above 45 K, while at lower temperatures other defects dominate. A model is suggested which explains the exponential character of J c ( T ) obtained for the untwinned region. |
| Databáze: | OpenAIRE |
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