Writing, operation and reading of vortices in intrinsic Josephson junctions

2008 Fiscal Year Final Research Report

• Project/Area Number: 18510113
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Microdevices/Nanodevices
• Research Institution: National Institute for Materials Science
• Principal Investigator: HATANO Takeshi National Institute for Materials Science, ナノ物質ラボ, グループリーダー (50354337)
• Co-Investigator(Kenkyū-buntansha): WANG Huabing 独立行政法人物質・材料研究機構, ナノ物質ラボ, 主幹研究員 (70421427)
• Project Period (FY): 2006 – 2008
• Keywords: ジョセフソン磁束 / ロックイン現象 / 不揮発性記憶 / 固有ジュセフソン接合

Research Abstract

高温超伝導体は層状の結晶構造そのものが超伝導性と絶縁性を示すことから、ジョセフソン素子としてどうさすることが知られ、固有ジョセフソン接合と呼ばれている。固有ジョセフソン接合Y-123系における磁束量子の層平行磁束と層に垂直の磁束との二状態間を、電流によりスイッチングさせることに成功した。磁束状態は温度を保持している限り電流を切っても不揮発性で記憶されていることを見いだした。また、その繰り返し読み出し・繰り返し書き込み消去動作を確認した。

Research Products

• [Journal Article] Bi系高温超伝導体単結晶ウイスカー、超-高周波・低消費電力・集積素子の開発 (2009)
  • Author(s): 羽多野毅
  • Journal Title: 工業材料 57巻1号 Pages: 32-33
• [Journal Article] Flux-flow behaviors on a Bi2Sr2CaCu2O8+ (Bi-2212) stack (2008)
  • Author(s): S.-J. Kim, T. Hatano, and M. Blamire
  • Journal Title: J. Appl. Phys. 103 Pages: 07C716(1-3)
• [Journal Article] Observation of intrinsic Josephson effects in tetragonally synthesized single-crystalline NdBa2Cu3O6.65 films grown by tri-phase epitaxy (2008)
  • Author(s): KungSung. Yun, Takeshi Hatano, Shinichi Arisawa, Akira Ishii, Huabing Wang Tsutomu Yamashita, Ienari Iguchi, Masashi Kawasaki and Hideomi Koinuma
  • Journal Title: Supercond. Sci. Technol. 21 Pages: 075006-075009
• [Journal Article] Possible formation of rectangular Josephson-vortex lattice in narrow Bi-2212 intrinsic Josephson junctions by the enhanced edge effect (2007)
  • Author(s): T. Hatano, S. Kawakami, S. M. Kim, S. Urayama, K. Inomata, M. Nagao, S.-J. Kim, H.B. Wang , K.S. Yun, Y. Takano, A. Ishii, S. Arisawa, T. Yamashita, M. Tachiki
  • Journal Title: J. Phys. Chem. Solids 67 Pages: 365-368
• [Journal Article] Current-dependent flux-flow resistance and resonant current steps in BSCCO intrinsic Josephson junctions (2007)
  • Author(s): S. M. Kim, S. Urayama, H. B. Wang, S. Kawakami, K. Inomata, M. Nagao, K. S. Yun, Y. Takano, K. Lee and T. Hatano
  • Journal Title: J. Phys. Chem. Solids 67 Pages: 438-441
• [Journal Article] Periodic Oscillations of Josephson-Vortex Flow Resistance in Oxygen-Deficient YBa2Cu3Ox (2006)
  • Author(s): M. Nagao, S. Urayama, S. M. Kim, H. B. Wang, K. S. Yun, Y. Takano, T. Hatano, I. Iguchi, T. Yamashita, M. Tachiki, H. Maeda, M. Sato
  • Journal Title: Phys. Rev. B 74 Pages: 054502(1-5)
• [Journal Article] 高温超伝導体ウィスカ-高温超伝導体の結晶構造は多重ジョセフソン素子構造 (2006)
  • Author(s): 長尾雅則, 羽多野毅
  • Journal Title: セラミックス 41 Pages: 283-287
• [Journal Article] Images of Interlayer Vortices and c-axis Penetration Depth of High-Tc YBa2Cu3O7-y Superconductor (2006)
  • Author(s): I. Iguchi, T. Takeda, T. Uchiyama, A. Sugimoto, T. Hatano
  • Journal Title: Phys. Rev. B 73 Pages: 224519(1-5)
• [Presentation] ジョセフソン磁束/交差磁束状態の 電流によるスイッチング (2009)
  • Author(s): 羽多野 毅, 長尾 雅則、稲本 悠也、王 華兵
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学、東京都豊島区
  • Year and Date: 2009-03-30
• [Presentation] Switching between Vortex-flow and pinned states in Intrinsic Josephson Junctions (2008)
  • Author(s): T. Hatano H. B. Wang, Y. Inamoto, and M. Nagao
  • Organizer: The 6th International Symposium on Intrinsic Josephson Effect and Plasma Oscillations
  • Place of Presentation: POSTEC, Pohang, Korea
  • Year and Date: 2008-07-17
• [Presentation] Non-volatile flash memory effect in intrinsic Josephson junctions (2008)
  • Author(s): T. Hatano, H. B. Wang, M. Nagao, Y. Inamoto and S. Arisawa
  • Organizer: 第4回「超伝導ナノサイエンスと応用」研究会
  • Place of Presentation: 兵庫県有馬市
  • Year and Date: 2008-03-28
• [Presentation] THz excitation in intrinsic Josephson junctions (2007)
  • Author(s): T. Hatano, , H. B. Wang, K. S. Yun, S. Arisawa, Y. F. Wei, A. Ishii and I. Iguchi
  • Organizer: 4th CREST Nano-Virtual-Labs Joint Workshop on Superconductivity
  • Place of Presentation: Kita-Kyushu Fukuoka
  • Year and Date: 2007-12-19
• [Presentation] Non-volatile flash memory effect in superconducting junctions by the flow states of Josephson and pancake vortices (2007)
  • Author(s): T. Hatano, H. B. Wang, M. Nagao, K. S. Yun and S. Arisawa
  • Organizer: 7th International AQDJJ conference on Frontiers of Josephson Physics and Nanoscience (FJPN07) in memory of the late professor Bob Parmentier
  • Place of Presentation: Palinuro, Italy
  • Year and Date: 2007-09-26
• [Presentation] Superconducting flash memory by programming vortex state in intrinsic Josephson junctions (2007)
  • Author(s): T. Hatano, M. Nagao, K. S. Yun, H. B. Wang
  • Organizer: European Conference on Applied Superconductivity
  • Place of Presentation: Brussels, Belgian
  • Year and Date: 2007-09-20
• [Presentation] Lock-in phenomena of Josephson vortices in Bi-2212 and RE-123 intrinsic Josephson junctions (2007)
  • Author(s): T. Hatano, K. S. Yun, S. Arisawa and H. B. Wang
  • Organizer: Joint ESF and JSPS Conference on VORTEX MATTER IN NANOSTRUCTURED SUPERCONDUCTORS (VORTEX V)
  • Place of Presentation: Rhodes, Greek
  • Year and Date: 2007-09-12
• [Presentation] 固有ジョセフソン接合の交差磁束状態でのパンケーキ磁束の消去と書き込み (2007)
  • Author(s): 羽多野 毅, 長尾 雅則, 尹 〓成, 王 華兵
  • Organizer: 応用物理学会2007年春の学術講演会
  • Place of Presentation: 青山学院大学相模原キャンパス、神奈川県相模原市
  • Year and Date: 2007-03-27