| Presentation | 1998/4/22 Fabrication and mm- and sub-mm-wave Properties of High-Tc Ramp-type Josephson Junctions on MgO H. Myoren, J. Chen, L. Amatuni, A.H. Sonnenberg, G.J. Gerristima, H. Rogalla, T. Yamashita, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have successfully fabricated ramp-type junctions on MgO substrates using an SrTiO_3(STO) buffer layer and we have studied the mm- and sub-mm-wave range properties of these junctions. Using STO buffer layers, we could deposit the films with standard deposition conditions for the junctions on STO substrates and the quality of the PrBa_2Cu_3-xGa_xO_7-δ(PBCGO) barrier and YBa_2Cu_3O_7-δ(YBCO) counterelectrode was improved compared to those deposited on bare MgO with low-deposition temperature. The junctions clearly showed Shapiro steps under irradiation of mm-wave (100GHz) and sub-mm-wave (0.762GTz). We observed Josephson emission at 50GHz from a junction on a STO buffered MgO substrate at 17K. Measured values of spectral characteristics-maximum emitted power and line-width-were similar to these for elassical junctions made from low temperature superconductors. We have also confirmed mixing in the self-oscillating mode using mm-wave (100GHz) and sub-mm-wave (0.762THz) signals. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | High-Tc ramp-type junctions / MgO / STO buffer layers / mm- and sub-mm-wave properties |
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| Conference Information | |
| Committee | MW |
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| Conference Date | 1998/4/22(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Microwaves (MW) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fabrication and mm- and sub-mm-wave Properties of High-Tc Ramp-type Josephson Junctions on MgO |
| Sub Title (in English) | |
| Keyword(1) | High-Tc ramp-type junctions |
| Keyword(2) | MgO |
| Keyword(3) | STO buffer layers |
| Keyword(4) | mm- and sub-mm-wave properties |
| 1st Author's Name | H. Myoren |
| 1st Author's Affiliation | RIEC, Tohoku University, JST, CREST() |
| 2nd Author's Name | J. Chen |
| 2nd Author's Affiliation | RIEC, Tohoku University, JST, CREST |
| 3rd Author's Name | L. Amatuni |
| 3rd Author's Affiliation | Low Temperature Division, Faculty of Applied Phsics, University of Twente |
| 4th Author's Name | A.H. Sonnenberg |
| 4th Author's Affiliation | Low Temperature Division, Faculty of Applied Phsics, University of Twente |
| 5th Author's Name | G.J. Gerristima |
| 5th Author's Affiliation | Low Temperature Division, Faculty of Applied Phsics, University of Twente |
| 6th Author's Name | H. Rogalla |
| 6th Author's Affiliation | Low Temperature Division, Faculty of Applied Phsics, University of Twente |
| 7th Author's Name | T. Yamashita |
| 7th Author's Affiliation | RIEC, Tohoku University, JST, CREST |
| Date | 1998/4/22 |
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| Volume (vol) | vol.98 |
| Number (no) | 15 |
| Page | pp.pp.- |
| #Pages | 6 |
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