| Presentation | 2009-07-21 Evaluation of MgB_2 Josephson junctions with amorphous semiconductor barriers Naoki MITAMURA, Chikaze MARUYAMA, Hiroyuki AKAIKE, Akira FUJIMAKI, Rintaro ISHII, Yoshihiro NIIHARA, Michio NAITO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have fabricated and evaluated MgB_2 Josephson junctions with amorphous semiconductor barriers. We have used amorphous boron and amorphous silicon as barrier layers. Each trilayer has been formed on sapphire-C substrates by a co-evaporation method. In the both kinds of junctions, Josephson current and quasiparticle feature were observed. In the junctions with boron barriers, critical current density J_c reached a maximum of 450A/cm^2. In the junction with 10-nm-thick barrier whose characteristics is relatively uniform, J_c was 15A/cm^2 and I_cR_n was 0.13mV. Meanwhile, in the junctions with silicon barriers, J_c was 0.9A/cm^2 and I_cR_n was 0.08mV with the 5-nm-thick barrier. Furthermore, quasiparticle feature was clearly observed compared with the junctions with boron barrier. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Josephson junction / MgB_2 / amorphous semiconductor barrier / Boron / Silicon |
| Paper # | SCE2009-12 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2009/7/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | Evaluation of MgB_2 Josephson junctions with amorphous semiconductor barriers |
| Sub Title (in English) | |
| Keyword(1) | Josephson junction |
| Keyword(2) | MgB_2 |
| Keyword(3) | amorphous semiconductor barrier |
| Keyword(4) | Boron |
| Keyword(5) | Silicon |
| 1st Author's Name | Naoki MITAMURA |
| 1st Author's Affiliation | Nagoya University() |
| 2nd Author's Name | Chikaze MARUYAMA |
| 2nd Author's Affiliation | Nagoya University |
| 3rd Author's Name | Hiroyuki AKAIKE |
| 3rd Author's Affiliation | Nagoya University |
| 4th Author's Name | Akira FUJIMAKI |
| 4th Author's Affiliation | Nagoya University |
| 5th Author's Name | Rintaro ISHII |
| 5th Author's Affiliation | Tokyo University of Agriculture and Technology |
| 6th Author's Name | Yoshihiro NIIHARA |
| 6th Author's Affiliation | Tokyo University of Agriculture and Technology |
| 7th Author's Name | Michio NAITO |
| 7th Author's Affiliation | Tokyo University of Agriculture and Technology |
| Date | 2009-07-21 |
| Paper # | SCE2009-12 |
| Volume (vol) | vol.109 |
| Number (no) | 141 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |