Evidence for pinning by (Sr,Ca)2CuOy particles in partial-melting processed bulk Bi2Sr2CaCu2O8+δ ceramics
| Autor: | M. R. Koblischka, H. Bratsberg, Tom H. Johansen, K. Fossheim, Sun Li Huang |
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| Rok vydání: | 1998 |
| Předmět: |
Materials science
Flux pinning Partial melting Analytical chemistry Energy Engineering and Power Technology Flux Trapping Condensed Matter Physics Microstructure Magnetic flux Electronic Optical and Magnetic Materials visual_art visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Large size |
| Zdroj: | Physica C: Superconductivity. 300:207-211 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(98)00105-1 |
| Popis: | Flux distributions of partial-melting processed Bi 2 Sr 2 CaCu 2 O 8+ δ ceramics are obtained using magneto-optic imaging. In remanent states ( μ 0 H a =0 T), large amounts of trapped flux are observed along (Sr,Ca) 2 CuO y particles embedded in the Bi 2 Sr 2 CaCu 2 O 8+ δ matrix. Despite the relatively large size of these particles (up to 30 μ m), the pinning effect is similar to that of Y 2 BaCuO 5 particles in melt-processed YBa 2 Cu 3 O 7− δ . Furthermore, we discuss how the pinning capability of non-superconducting particles of different sizes and densities will show up in magneto-optic images. |
| Databáze: | OpenAIRE |
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