First-principles study on the origin of electric polarization in multiferroics

• Project/Area Number: 19740182
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics I
• Research Institution: Kanazawa University
• Principal Investigator: ISHII Fumiyuki Kanazawa University, 数物科学系, 助教 (20432122)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥2,180,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥180,000); Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2007: ¥1,400,000 (Direct Cost: ¥1,400,000)
• Keywords: マルチフェロイクス / 第一原理計算 / 電気分極 / スピン軌道相互作用 / ノンコリニア磁性 / Mn酸化物 / ベリー位相 / 磁性体 / マルチフェロイックス / 誘電体物性 / 磁性 / 計算物理 / 物性理論

Research Abstract

酸化物マルチフェロイクスにおいて電気分極発現機構について解明をおこなった。交換歪みによる機構は以前から知られていたが、本研究ではより一般的なスピン軌道相互作用に起因した電気分極発現メカニズムについて、第一原理計算から明らかにした。

Research Products

• [Journal Article] Relativistic Effect on the Bistability of Bi 012 Nanofims (2009)
  • Author(s): 小鷹浩毅, 石井史之, (他5名, 2番目)
  • Journal Title: e-Journal of Surface Science and Nanotechnology誌 7巻 Pages: 13-16
  • Peer Reviewed
• [Journal Article] Carrier-induced noncollinear magnetism in perovskite manganites by first-principles calculations (2009)
  • Author(s): 澤田啓介, 石井史之
  • Journal Title: Journal of Physics: Condensed Matter誌 21巻
  • NAID: 120001256693
  • Peer Reviewed
• [Journal Article] Phase Control of Graphene Nanoribbon by Carrier Doping: Appearance of Noncollinear Magnetism (2009)
  • Author(s): 澤田啓介, 石井史之, (他3名, 2番目)
  • Journal Title: Nano Letters誌 9巻 Pages: 269-272
  • Peer Reviewed
• [Journal Article] Phase Control of Graphene Nanoribbon by Carrier Doping : Appearance of Noncollinear Magnetism (2009)
  • Author(s): K. Sawada, F. Ishii, M. Saito, S. Okada, and T. Kawai
  • Journal Title: Nano Letters 9 Pages: 269-272
  • Peer Reviewed
• [Journal Article] Carrier-induced noncollinear magnetism in perovskite manganites by first-principles calculations (2009)
  • Author(s): K. Sawada and F. Ishii
  • Journal Title: Journal of Physics : Condensed Matter 21
  • NAID: 120001256693
  • Peer Reviewed
• [Journal Article] Relativistic Effect on the Bistability of Bi 012 Nanofims (2009)
  • Author(s): H. Kotaka, F. Ishii, M. Saito, K. Sawada, Y. Uramoto, T. Nagao, and S. Yaginuma
  • Journal Title: e-Journal of Surface Science and Nanotechnology 7 Pages: 13-16
  • Peer Reviewed
• [Journal Article] Band-Gap Tuning in Magnetic Graphene Nanoribbons (2008)
  • Author(s): 澤田啓介, 石井史之, 斎藤峯雄
  • Journal Title: Applied Physics Express誌 1巻
  • NAID: 10025081085
  • Peer Reviewed
• [Journal Article] Band-Gap Tuning in Magnetic Graphene Nanoribbons (2008)
  • Author(s): K. Sawada, F. Ishii, and M. Saito
  • Journal Title: Applied Physics Express 1
  • NAID: 10025081085
  • Peer Reviewed
• [Presentation] マルチフェロイック系Mn酸化物における軌道秩序の第一原理計算 (2009)
  • Author(s): 石井史之, 澤田啓介
  • Organizer: 物性研究所短期研究会計算物理
  • Year and Date: 2009-12-10
• [Presentation] Carrier-induced non-collinear magnetism in perovskite manganites by first-principles calculation (2008)
  • Author(s): 澤田啓介, 石井史之
  • Organizer: International Conference on Quantum Simulators and Design 2008
  • Place of Presentation: 東京
  • Year and Date: 2008-06-02
• [Presentation] First-principles calculation of lattice distortions and exchange interactions in perovskite manganites (2008)
  • Author(s): 澤田啓介, 石井史之, 尾崎泰助
  • Organizer: International Conference on Quantum Simulators and Design 2008
  • Place of Presentation: 東京
  • Year and Date: 2008-06-02
• [Presentation] Magnetically driven electric polarization in transition metal oxides from first principles (2008)
  • Author(s): 石井史之
  • Organizer: OpeMX/QMAS Workshop 2008
  • Place of Presentation: 石川
  • Year and Date: 2008-04-22
• [Presentation] 第一原理計算によるペロブスカイト型Mn酸化物のノンコリニア磁性 (2008)
  • Author(s): 澤田啓介, 石井史之
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 大阪
  • Year and Date: 2008-03-24
• [Presentation] 第一原理計算によるペロブスカイト型Mn酸化物のノンコリニア磁性 (2008)
  • Author(s): 澤田啓介(研究協力者), 石井史之
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪
  • Year and Date: 2008-03-24
• [Presentation] First-principles study of electric polarization in non-collinear magnetic structure (2008)
  • Author(s): 石井史之, 尾崎泰助, 永長直人, 寺倉清之
  • Organizer: Fundamental Physics of Ferroelectrics
  • Place of Presentation: アメリカ合衆国バージニア州
  • Year and Date: 2008-02-11
• [Presentation] First-principles study of electric polarization in non-collinear magnet ic structure (2008)
  • Author(s): 石井 史之
  • Organizer: Fundamental Physics of Ferroelectrics, 2008
  • Place of Presentation: アメリカ合衆国、バージニア州
  • Year and Date: 2008-02-11
• [Presentation] 三角格子・カゴメ格子系マルチフェロイクスにおけるノンコリニア磁性と電気分極の第一原理計算 (2007)
  • Author(s): 石井史之, 尾崎泰助, 永長直人, 寺倉清之
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道
  • Year and Date: 2007-09-24
• [Presentation] 三角格子・カゴメ格子系マルチフェロイクスにおけるノンコリニア磁性と電気分極の第一原理計算 (2007)
  • Author(s): 石井 史之
  • Organizer: 日本物理学会
  • Place of Presentation: 北海道
  • Year and Date: 2007-09-24
• [Presentation] ペロブスカイト型Mn酸化物の格子ひずみと交換相互作用の第一原理計算 (2007)
  • Author(s): 澤田啓介, 石井史之
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道
  • Year and Date: 2007-09-21
• [Presentation] ペロブスカイト型Mn酸化物の格子ひずみと交換相互作用の第一原理計算 (2007)
  • Author(s): 澤田啓介(研究協力者), 石井史之
  • Organizer: 日本物理学会
  • Place of Presentation: 北海道
  • Year and Date: 2007-09-21
• [Presentation] First-principles study of electric polarization in non-collinear magnetic structure (2007)
  • Author(s): 石井史之, 尾崎泰助, 永長直人, 寺倉清之
  • Organizer: 2007 CERC International Symposium
  • Place of Presentation: 東京
  • Year and Date: 2007-05-22
• [Presentation] First-principles study of electric polarization in non-collinear magnetic structure (2007)
  • Author(s): 石井 史之
  • Organizer: CERC2007
  • Place of Presentation: 東京
  • Year and Date: 2007-05-22
• [Book] Spintronics -From GMR to Quantum Information, 40th IFF Spring School,Juelich 2009 (S. Bluegel, 他編, Electronic Structures of Transition-Metal Oxides, A5(1)-A5(16)) (2009)
  • Author(s): F. Ishii(担当部分, 単著)
  • Publisher: Forschungszentrum Juelich GmbH