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Observation of the magnetic flux quantum that decides three dimensional magnetic field dependence of a superconducting junction

Research Project

Project/Area Number 18560351
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Electron device/Electronic equipment
Research InstitutionKanagawa University

Principal Investigator

NAKAYAMA Akiyoshi  Kanagawa University, faculty of engineering, Professor (90183524)

Co-Investigator(Kenkyū-buntansha) ABE Susumu  Kanagawa University, 工学部, assistant professor (10333147)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,800,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2006: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsJosephson junction / Nb superconducting thin film / magnetic flux trap / vibrating sample magnetometer / 磁束トラップ / Josephson接合 / 超伝導接合 / 磁束量子 / 超伝導電流 / SQUID
Research Abstract

Modulation characteristics of Josephson current is usually measured by applying the magnetic field in the direction parallel to the plane of a Josephson junction. We have studied the modulation characteristics of Josephson current by two-dimensional scan of the external magnetic field. However, it is generally known that when the magnetic flux is trapped into superconducting thin film, it has a bad influence on characteristics of superconducting electronic devices. We have measured the change in two-dimensional magnetic field dependence of a Josephson junction by magnetic flux quantum trapped in superconducting thin film. This time, we investigated the condition that the magnetic flux is trapped in the superconducting thin film in detail by measuring the dependence of I_c upon the perpendicular applied magnetic field. When the perpendicular magnetic field of more than 2400A/m was applied to the Josephson junction, Josephson current was modulated irreversibly. This is because the magnetic flux is trapped in Nb superconducting thin film. Next, we vibrated the sample near the search coil after a perpendicular magnetic field was applied and was reduced to zero, and investigated the magnetization of the Nb superconducting thin film by observing the output voltage of the search coil. When the perpendicular magnetic field of less than 1800A/m was applied to the Josephson junction, the output voltage of the search coil was not observed, and the trapped magnetic flux could not be observed. When the perpendicular magnetic field of more than 2400A/m was applied to the Josephson junction, the output voltage of the search coil of 20 μV was observed, and we confirmed the trapped magnetic flux. These results indicate that the Josephson current was irreversibly modulated due to trapped magnetic flux.

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (36 results)

All 2008 2007 2006 Other

All Journal Article (18 results) (of which Peer Reviewed: 9 results) Presentation (18 results)

  • [Journal Article] Two-dimensional magnetic field dependence of current-voltage characteristics of rectangular,hexagonal and triangle shape superconducting junctions and DC-SQUIDs2008

    • Author(s)
      A Nakayama, N Watanabe, S Abe, Y Nishi and Y Okabe
    • Journal Title

      Journal of Physics:Conference Series 97

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] The shape-dependency of two-dimensional magnetic field dependence of a Josephson junction2008

    • Author(s)
      N.Watanabe, A.Nakayama, S.Abe, S.Kawai, Y.Nishi, K.Masuda
    • Journal Title

      Journal of Applied Physics 103

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Two-dimensional magnetic field dependence of current-voltage characteristics of rectangular, hexagonal and triangle shape superconducting junctions and DC-SQUIDs2008

    • Author(s)
      A Nakayama, N Watanabe, S Abe, Y Nishi, Y Okabe
    • Journal Title

      Journal of Physics : Conference Series Vol.97

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] The shape-dependency of two-dimensional magnetic field dependence of a Josephson junction2008

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe, S. Kawai, Y. Nishi, K. Masuda
    • Journal Title

      Journal of Applied Physics Vol.103

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Two-dimensional magnetic field dependence of current-voltage characteristics of rectangular, hexagonal and triangle shape superconducting junctions and DC-SQUIDS2008

    • Author(s)
      A Nakayama, N Watanabe, S Abe, Y Nishi and Y Okabe
    • Journal Title

      Journal of Physics: Conference Series 97

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The shape-dependency of two-dimensional magnetic field dependence of a Josephson junction2008

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe, S. Kawai, Y. Nishi, K. Masuda
    • Journal Title

      Journal of Applied Physics 103

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of trapped magnetic flux quantum on two-dimensional magnetic field dependence of a Josephson junction2007

    • Author(s)
      N.Watanabe, A.Nakayama, S.Abe
    • Journal Title

      Journal of Applied Physics 101

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2006 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of trapped magnetic flux quantum on two-dimensional magnetic field dependence of a Josephson junction2007

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe
    • Journal Title

      Journal of Applied Physics(Issue 9) Vol.101

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Influence of trapped magnetic flux quantum on two-dimensional magnetic field dependence of a Josephson junction2007

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe
    • Journal Title

      Journal of Applied Physics 101

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The measurement of Josephson current of double Josephson junction2006

    • Author(s)
      K.Aizawa, A.Nakayama, S.Abe, N.Watanabe
    • Journal Title

      Journal of Physics:Conference Series 43

      Pages: 1088-1091

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Hexagnal symmetry of magnetic field dependence of Josephson current through triangle shape superconducting junctions2006

    • Author(s)
      A.Nakayama, S.Abe, T.Shimoyama, N.Watanabe, Hsu Jui-Pang, Y.Okabe
    • Journal Title

      Journal of Physics:Conference Series 43

      Pages: 1092-1095

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Influence of the Nb middle layer on the current of a double Josephson junction2006

    • Author(s)
      K.Aizawa, A.Nakayama, S.Abe, N.Watanabe
    • Journal Title

      Superconductor Science and Technology 19

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] The measurement of Josephson current of double Josephson junction2006

    • Author(s)
      K. Aizawa, A. Nakayama, S. Abe, N. Watanabe
    • Journal Title

      Journal of Physics : Conference Series Vol.43

      Pages: 1088-1091

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Hexagnal symmetry of magnetic field dependence of Josephson current through triangle shape superconducting junctions2006

    • Author(s)
      A. Nakayama, S. Abe, T. Shirnoyama, N. Watanabe, Hsu Jui-Pang, Y. Okabe
    • Journal Title

      Journal of Physics : Conference Series Vol.43

      Pages: 1092-1095

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Influence of the Nb middle layer on the current of a double Josephson junction2006

    • Author(s)
      K. Aizawa, A. Nakayama, S. Abe, N. Watanabe
    • Journal Title

      Superconductor Science and Technology Vol.19, No.5

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] The measurement of Josephson current of double Josephson junction2006

    • Author(s)
      K.Aizawa, A.Nakayama, S.Abe, N.Watanabe
    • Journal Title

      Journal of Physics : Conference Series 43

      Pages: 1088-1088

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hexagnal Symmetry of magnetic field dependence of Josephson current through triangle shape superconducting junctions2006

    • Author(s)
      A.Nakayama, S.Abe, N.Watanabe, Hsu Jui-Pang, Y.Okabe
    • Journal Title

      Journal of Physics : Conference Series 43

      Pages: 1092-1092

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Influence of the Nb middle layer on the current of a double Josephson junction2006

    • Author(s)
      K.Aixzawa, A.Nakayama, S.Abe, N.Watanabe
    • Journal Title

      Superconductor Science and Technology 19・5

    • Related Report
      2006 Annual Research Report
  • [Presentation] ジョセフソン電流の垂直磁界依存性と振動試料型磁力計によるNb超伝導薄膜の磁束の測定2008

    • Author(s)
      渡邉 騎通, 中山 明芳, 阿部 晋, 西洋 平, 増田 浩司, 須田 光紀
    • Organizer
      2008年春季第55回応用物理学関係連合講演会, 28a-NA-1
    • Place of Presentation
      日本大学理工学部船橋キャンパス
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 振動試料型磁力計によるNb超伝導薄膜の磁束分布の測定2008

    • Author(s)
      渡邉 騎通, 中山 明芳, 阿部 晋, 西洋 平, 増田 浩司, 須田 光紀
    • Organizer
      電子情報通信学会2008年総合大会, C-8-5
    • Place of Presentation
      北九州学術研究都市
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] ジョセフソン電流の垂直磁界依存性と振動試料型磁力計によるNb超伝導薄膜の磁束の測定2008

    • Author(s)
      渡邉騎通, 中山明芳, 阿部晋, 西洋平, 増田浩司, 須田光紀
    • Organizer
      2008年春季 第55回応用物理学関係連合講演会
    • Place of Presentation
      日本大学理工学部 船橋キャンパス
    • Related Report
      2007 Annual Research Report
  • [Presentation] 振動試料型磁力計によるNb超伝導薄膜の磁束分布の測定2008

    • Author(s)
      渡邉騎通, 中山明芳, 阿部晋, 西洋平, 増田浩司, 須田光紀
    • Organizer
      電子情報通信学会2008年総合大会
    • Place of Presentation
      北九州学術研究都市
    • Related Report
      2007 Annual Research Report
  • [Presentation] The shape-dependency of two-dimensional magnetic field dependence of a Josephson junction2007

    • Author(s)
      N.Watanabe, A.Nakayama, S.Abe, S.Kawai, Y.Nishi, K.Masuda
    • Organizer
      52nd Magnetism and Magnetic Materials Conference, HQ-05
    • Place of Presentation
      Tampa,U.S.A.
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Modulation characteristics of a Josephson junction by three-dimensional scan of the magnetic field parallel and perpendicular to the plane of junction2007

    • Author(s)
      N.Watanabe, A.Nakayama, S.Abe, Y.Nishi, K.Masuda, M.Suda
    • Organizer
      2007 China-Japan Joint Meeting on Superconduct or Electronics
    • Place of Presentation
      Nanjing,China
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Modulation Characteristics of a Josephson Junction by Applying the Magnetic Field Perpendicular to the Junction Plane2007

    • Author(s)
      N.Watanabe, A.Nakayama, S.Abe, Y.Nishi, K.Masuda, M.Suda
    • Organizer
      8th European Conference on Applied Superconductivity, 0490
    • Place of Presentation
      Brussels,Belgium
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Two-dimensional Magnetic Field Dependence of Current-Voltage Characteristics of Rectangular,Hexagonal and Triangle Shape Superconducting Junctions and DC-SQUIDs2007

    • Author(s)
      A.NAKAYAMA, N.WATANABE, S.ABE, Y.NISHI, Y.OKABE
    • Organizer
      8th European Conference on Applied Superconductivity, 0491
    • Place of Presentation
      Brussels,Belgium
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Influence of trapped magnetic flux quantum on two-dimensional magnetic field dependence of a Josephson junction2007

    • Author(s)
      N.Watanabe, A.Nakayama, S.Abe
    • Organizer
      10TH JOINT MMM/INTERMAG CONFERENCE, EP-10
    • Place of Presentation
      Baltimore,U.S.A.
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] ジョセフソン接合の二次元磁界変調特性の接合形状依存性2007

    • Author(s)
      渡邉 騎通, 中山 明芳, 阿部 晋, 河合 翔, 鶴岡 茂紀, 西洋 平, 増田 浩司
    • Organizer
      電子情報通信学会2007年ソサイエティ大会, C-8-2
    • Place of Presentation
      鳥取大学鳥取キャンパス
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 接合形状によるジョセフソン接合の二次元磁界変調特性の変化2007

    • Author(s)
      渡邉 騎通, 中山 明芳, 阿部 晋, 河合 翔, 鶴岡 茂紀, 西洋 平, 増田 浩司, 須田 光紀
    • Organizer
      2007年秋季第68回応用物理学会学術講演, 4a-ZH-1
    • Place of Presentation
      北海道工業大学
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Modulation characteristics of a Josephson junction by three-dimensional scan of the magnetic field parallel and perpendicular to the plane of junction2007

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe, Y. Nishi, K. Masuda, M. Suda
    • Organizer
      2007 China-Japan Joint Meeting on Superconductor Electronics
    • Place of Presentation
      Nanjing, China
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] ジョセフソン接合の二次元磁界変調特性の接合形状依存性2007

    • Author(s)
      渡邊騎通, 中山明芳, 阿部晋, 河合翔, 鶴岡茂紀, 西洋平, 増田浩司
    • Organizer
      電子情報通信学会2007年ソサイエティ大会
    • Place of Presentation
      鳥取大学 鳥取キャンパス
    • Related Report
      2007 Annual Research Report
  • [Presentation] 接合形状によるジョセフソン接合の二次元磁界変調特性の変化2007

    • Author(s)
      渡邉騎通, 中山明芳, 阿部晋, 河合翔, 鶴岡茂紀, 西洋平, 増田浩司, 須田光紀
    • Organizer
      2007年秋季 第68回応用物理学会学術講演
    • Place of Presentation
      北海道工業大学
    • Related Report
      2007 Annual Research Report
  • [Presentation] The shape-dependency of two-dimensional magnetic field dependence of a Josephson junction

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe, S. Kawai, Y Nishi, K. Masuda
    • Organizer
      52nd Magnetism and Magnetic Materials Conference, HQ-05
    • Place of Presentation
      Tampa U. S. A.
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Modulation Characteristics of a Josephson Junction by Applying the Magnetic Field Perpendicular to the Junction Plane

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe, Y. Nishi, K. Masuda, M. Suda
    • Organizer
      8th European Conference on Applied Superconductivity, 0490, Brussels
    • Place of Presentation
      Belgium
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Two-dimensional Magnetic Field Dependence of Current-Voltage Characteristics of Rectangular, Hexagonal and Triangle Shape Superconducting Junctions and DC-SQUIDs

    • Author(s)
      A. NAKAYAMA, N. WATANABE, S. ABE, Y. NISHI, Y. OKABE
    • Organizer
      8th European Conference on Applied Superconductivity, 0491, Brussels
    • Place of Presentation
      Belgium
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Influence of trapped magnetic flux quantum on two-dimensional magnetic field dependence of a Josephson junction

    • Author(s)
      N. Watanabe, A. Nakayama, S. Abe
    • Organizer
      10TH JOINT MMM/INTERMAG CONFERENCE, EP-10
    • Place of Presentation
      Baltimore, U. S. A
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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