| Автор | Yanwei Ma |
| Автор | H Kumakura |
| Автор | A Matsumoto |
| Автор | H Hatakeyama |
| Автор | K Togano |
| Дата выпуска | 2003-08-01 |
| dc.description | Fe-sheathed MgB<sub>2</sub> tapes were prepared by the in situ powder-in-tube technique by 5 at ZrSi<sub>2</sub>, ZrB<sub>2</sub> and WSi<sub>2</sub> doping, respectively. The doping effect of these compounds on the microstructure and superconducting properties of MgB<sub>2</sub> tapes has been investigated by using x-ray diffraction, scanning electron microscope, transport measurements and dc susceptibility measurements. Compared to the undoped samples, J<sub>c</sub> for all the doped samples were much improved; the best result in terms of J<sub>c</sub> was achieved for ZrSi<sub>2</sub> doping, by up to a factor of 3.4 at 4.2 K in magnetic fields up to 12 T. Moreover, these dopants did not significantly decrease the transition temperature. The J<sub>c</sub>–B curves of WSi<sub>2</sub>-doped tapes show better performance in higher magnetic fields in comparison to undoped tapes, suggesting that pinning centres effective in a high-field region were possibly introduced. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Improvement of critical current density in Fe-sheathed MgB<sub>2</sub> tapes by ZrSi<sub>2</sub>, ZrB<sub>2</sub> and WSi<sub>2</sub> doping |
| Тип | paper |
| DOI | 10.1088/0953-2048/16/8/304 |
| Electronic ISSN | 1361-6668 |
| Print ISSN | 0953-2048 |
| Журнал | Superconductor Science and Technology |
| Том | 16 |
| Первая страница | 852 |
| Последняя страница | 856 |
| Аффилиация | Yanwei Ma; Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Аффилиация | H Kumakura; Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Аффилиация | A Matsumoto; Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Аффилиация | H Hatakeyama; Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Аффилиация | K Togano; Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Выпуск | 8 |
