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| Presentation | 2021-11-15 16:30 Pi-phase shift in NbN-based Josephson junctions with weak ferromagnet Pd89Ni11 interlayer Duong Pham, Riku Sugimoto, Kenjiro Oba, Yuto Takeshita, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki (Nagoya Univ.)  SCE2021-10 Link to ES Tech. Rep. Archives: SCE2021-10 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We demonstrated the $B&P(B-phase shift in NbN-based Josephson junction with a weak ferromagnetic Pd89Ni11 interlayer (NbN/PdNi/NbN junctions). The NbN/PdNi/NbN junctions with PdNi thicknesses of 10 - 40 nm were fabricated and studied. The junction show a clear overdamped current-voltage characteristic, which is typically for the SFS junction. We observed a non-monotonic dependence of critical currents on PdNi thicknesses, indicating the interplay of superconductivity and ferromagnetism. From the fitting an expression of the Usadel equation on the experimental data, the 0- and $B&P(B-region with respect to PdNi thickness could be expected. We selected junctions with PdNi thickness in the expected $B&P(B-region and fabricated SFS-SQUIDs for measuring the magnetic field-dependent critical currents. A $B&P(B-phase shift has been observed in the modulation pattern of SFS-SQUID, which is evidence for the $B&P(B-state of the junction. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Ferromagnetic Josephson junction / SQUIDs / Pi-junctions / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 248, SCE2021-10, pp. 15-18, Nov. 2021. | |
| Paper # | SCE2021-10 | |
| Date of Issue | 2021-11-08 (SCE) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | SCE2021-10 Link to ES Tech. Rep. Archives: SCE2021-10 |
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| Conference Information | |
| Committee | SCE |
| Conference Date | 2021-11-15 - 2021-11-15 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | SCE |
| Conference Code | 2021-11-SCE |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Pi-phase shift in NbN-based Josephson junctions with weak ferromagnet Pd89Ni11 interlayer |
| Sub Title (in English) | |
| Keyword(1) | Ferromagnetic Josephson junction |
| Keyword(2) | SQUIDs |
| Keyword(3) | Pi-junctions |
| Keyword(4) | |
| Keyword(5) | |
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| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Duong Pham |
| 1st Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 2nd Author's Name | Riku Sugimoto |
| 2nd Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 3rd Author's Name | Kenjiro Oba |
| 3rd Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 4th Author's Name | Yuto Takeshita |
| 4th Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 5th Author's Name | Feng Li |
| 5th Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 6th Author's Name | Masamitsu Tanaka |
| 6th Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 7th Author's Name | Taro Yamashita |
| 7th Author's Affiliation | Nagoya University (Nagoya Univ.) |
| 8th Author's Name | Akira Fujimaki |
| 8th Author's Affiliation | Nagoya University (Nagoya Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-11-15 16:30:00 |
| Presentation Time | 25 minutes |
| Registration for | SCE |
| Paper # | SCE2021-10 |
| Volume (vol) | vol.121 |
| Number (no) | no.248 |
| Page | pp.15-18 |
| #Pages | 4 |
| Date of Issue | 2021-11-08 (SCE) |
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