| Presentation | 2000/8/22 SCE2000-14 / MW2000-78 Flux Noise of YBCO Thin Film Grain Boundary Junctions S Hirano, H Oyama, T Morooka, S Nakayama, S Kuriki, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We measured the flux of a wide bicrystal grain boundary of YBa_2Cu_3O_<7-δ> film, cooled to 77K in a field of 10 μT, using a superconducting thin-film coil and Nb-based SQUID. When the applied field was changed to, and above, small threshold values (+1.4μT, -1.5μT), the sample showed random switching noises with a sharp increase in low-frequency noise power. The results suggested that there was long-distance movement of vortices over 20 - 500 μm within the grain boundary, driven by the shielding current. The vortex movement was suppressed to lengths of less than 1 μm in a slotted grain boundary, by making an array of SQUIDs that can hold vortices stably. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Direct flux detection method / YBa_2Cu_3O_<7-δ>(YBCO) grain boundary junction / field cool(FC) / switching noise / hopping distance / parallel SQUID array |
| Paper # | SCE2000-14,MW2000-78 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2000/8/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | SCE2000-14 / MW2000-78 Flux Noise of YBCO Thin Film Grain Boundary Junctions |
| Sub Title (in English) | |
| Keyword(1) | Direct flux detection method |
| Keyword(2) | YBa_2Cu_3O_<7-δ>(YBCO) grain boundary junction |
| Keyword(3) | field cool(FC) |
| Keyword(4) | switching noise |
| Keyword(5) | hopping distance |
| Keyword(6) | parallel SQUID array |
| 1st Author's Name | S Hirano |
| 1st Author's Affiliation | Research Institute for Electronic Science, Hokkaido University() |
| 2nd Author's Name | H Oyama |
| 2nd Author's Affiliation | Research Institute for Electronic Science, Hokkaido University |
| 3rd Author's Name | T Morooka |
| 3rd Author's Affiliation | Seiko Instruments Inc. |
| 4th Author's Name | S Nakayama |
| 4th Author's Affiliation | Seiko Instruments Inc. |
| 5th Author's Name | S Kuriki |
| 5th Author's Affiliation | Research Institute for Electronic Science, Hokkaido University |
| Date | 2000/8/22 |
| Paper # | SCE2000-14,MW2000-78 |
| Volume (vol) | vol.100 |
| Number (no) | 274 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |