Development of a method for control and observation of domain walls in a micro-fabricated ferromagnet

• Project/Area Number: 19710084
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Nanostructural science
• Research Institution: Kumamoto University (2008); The Institute of Physical and Chemical Research (2007)
• Principal Investigator: HARA Masahiro Kumamoto University, 大学院・自然科学研究科, 准教授 (50392080)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,450,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥450,000); Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2007: ¥1,500,000 (Direct Cost: ¥1,500,000)
• Keywords: 微小磁性体 / 磁壁 / 超伝導体 / 半導体二次元電子ガス / 磁束量子 / 有機分子 / 金属ナノ接点 / マイスナー効果 / 量子化磁束

Research Abstract

1ミクロン以下の微小磁石における磁化構造の制御及び観測手法に関する研究を行った。非常に短い時間(ナノ秒程度)のパルス磁場を用いたり、超伝導体を微小磁石に近接させたりすることにより、微小磁石を制御する新しい知見を得ることができた。また、半導体微小素子の抵抗変化を用いることで、微小磁石における磁化構造の変化を高感度に検出する手法を確立した。

Research Products

• [Journal Article] Magnetic Interaction in a Submicron Ferromagnetic Disk/Supercnduct or Hybrid (2008)
  • Author(s): Masahiro Hara, Takashi Kimura, Yoshichika Otani
  • Journal Title: Physics Reports of Kumamoto University Vol.13 Pages: 107-114
• [Journal Article] Detection of paired domainwalls in a ferromagnetic ring by a bend resistance measurement (2008)
  • Author(s): Masahiro Hara, Takashi Kimura, Yoshichika Otani
  • Journal Title: Physica E Vol.40 Pages: 1108-1110
  • Peer Reviewed
• [Journal Article] Magnetic Interaction in a Submicron Ferromagnetic Disk/Superconductor Hybrid (2008)
  • Author(s): Masahiro Hara
  • Journal Title: Physics Reports of Kumamoto University 13 Pages: 107-114
  • NAID: 110006967814
• [Journal Article] Controlled depinning of pai red domain walls in a ferromagnetic ring circuit (2007)
  • Author(s): Masahiro Hara, Takashi Kimura, Yoshichika Otani
  • Journal Title: Appl. Phys. Lett. Vol.90
  • Peer Reviewed
• [Journal Article] Controlled depinning of domain walls in a ferromagnetic ring circuit (2007)
  • Author(s): M. Hara
  • Journal Title: Appl. Phys. Lett. 90
  • Peer Reviewed
• [Journal Article] Detection of paired domain walls in a ferromagnetic ring by a bend resistance measurement
  • Author(s): M. Hara
  • Journal Title: Physica E (in press)
  • Peer Reviewed
• [Presentation] 微小磁性体/超伝導体複合構造における磁気的相互作用 (2009)
  • Author(s): 原正大
  • Organizer: 第9回リサーチコア研究会
  • Place of Presentation: 九州大学
  • Year and Date: 2009-03-05
• [Presentation] 微小磁性体/超伝導体複合構造における磁気的相互作用の検出 (2008)
  • Author(s): 原正大
  • Organizer: 第6回火の国研究会
  • Place of Presentation: 熊本大学
  • Year and Date: 2008-12-13
• [Presentation] 磁気ディスク/超伝導体複合構造における磁気的相互作用 (2007)
  • Author(s): 原正大
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-22
• [Presentation] 微小磁気リングにおける対磁壁のパルス磁場制御 (2007)
  • Author(s): 原正大
  • Organizer: 第31回応用磁気学会学術講演会
  • Place of Presentation: 学習院大学
  • Year and Date: 2007-09-14
• [Presentation] 微小磁性体/超伝導体複合構造における磁化過程 (2007)
  • Author(s): 原正大
  • Organizer: 第45回茅コンファレンス
  • Place of Presentation: 長野
  • Year and Date: 2007-08-20
• [Presentation] Detection of paired do main walls in a ferromagnetic ring by a bend resistance measurement (2007)
  • Author(s): Masahiro Hara
  • Organizer: 17th International Conference on Electronic Properties of Two-Dimensional Systems(EP2DS-17)
  • Place of Presentation: Genova, Italy
  • Year and Date: 2007-07-16
• [Presentation] Detection of paired domain walls in a ferromagnetic ring by a bend resistance measurement (2007)
  • Author(s): M. Hara
  • Organizer: 17th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS-17)
  • Place of Presentation: Genova, Italy
• [Remarks] ホームページ等
  • URL: http://www.riken.jp/lab-www/nanomag/indexjpn.html
• [Remarks]
  • URL: http://www.riken.jp/lab-www/nanomag/indexjpn.html