Flux pinning and grain coupling studied by magneto-optical visualization in Bi2Sr2CaCu2O8+δ ceramics
| Autor: | Tom H. Johansen, Sun Li Huang, K. Fossheim, M. R. Koblischka, H. Bratsberg |
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| Rok vydání: | 1997 |
| Předmět: |
Materials science
Flux pinning Condensed matter physics Zener pinning Magnetic domain Energy Engineering and Power Technology Penetration (firestop) Condensed Matter Physics Grain size Electronic Optical and Magnetic Materials Vortex Condensed Matter::Superconductivity visual_art visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Pinning force |
| Zdroj: | Physica C: Superconductivity. :1469-1470 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(97)00839-3 |
| Popis: | Efforts are being made to improve the pinning and grain coupling in Bi23r2CaCu2O8+δ ceramics. For this purpose, the penetration of vortices is visualized by means of magneto-optical garnet indicators at temperatures up to 77 K. It is shown that there is a difference between the real grain size and the size of the magnetic domains. The samples are found to show a strong coupling between the grains, which is manifested by the observation of a flux front propagating into the sample on increasing field. |
| Databáze: | OpenAIRE |
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