Design of Photo-controllable Ferromagnetic Materials

• Project/Area Number: 18205018
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Functional materials chemistry
• Research Institution: Keio University
• Principal Investigator: EINAG Yasuak Keio University, 理工学部, 准教授 (00322066)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥51,740,000 (Direct Cost: ¥39,800,000、Indirect Cost: ¥11,940,000); Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2007: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000); Fiscal Year 2006: ¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
• Keywords: 電気 / 磁気的性質 / 光制御 / 磁性 / フォトクロミック / ナノ粒子 / 表面修飾 / 界面強磁性 / 磁性材料 / 光機能性材料 / 強磁性体 / フォトクロミック材料 / 表面磁性

Research Abstract

光応答性分子を利用した光制御できる磁性体の創製を行った。初めに、磁性体への光応答性分子の相互作用に注目し、実験的、理論的アプローチの両方からその基礎物理化学について明らかにした。一方、その知見をふまえて材料創製にフィードバックすることにより、室温強磁性にて巨大保磁力をもち、かつ異方性を示す高性能光スイッチング磁性材料の創製に成功した。

Research Products

• [Journal Article] Reversible Photo-tuning of Large Anisotropic Magnetization at the Interface between a Self-assembled Photochromic Monolayer and Gold (2009)
  • Author(s): M. Suda, N. Kameyama, A. Ikegami, Y. Einaga
  • Journal Title: J. Am. Chem. Soc. 131 Pages: 865-870
  • Peer Reviewed
• [Journal Article] Sequential Assembly of Photo-tunable Ferromagnetic Ultrathin-films with Perpendicular Magnetic Anisotropy (2009)
  • Author(s): M. Suda, Y. Einaga
  • Journal Title: Angew. Chem. Int. Ed. 48 Pages: 1754-1757
  • Peer Reviewed
• [Journal Article] Reversible Photo-tuning of Large Anisotropic Magnetization at the Interface between a Self-assembled Photochromic Monolayer and Gold. (2009)
  • Author(s): M. Suda, N. Kameyama, A. Ikegarni, Y. Einaga
  • Journal Title: J. Am. Chem. Soc. 131 Pages: 865-870
  • Peer Reviewed
• [Journal Article] Sequential Assembly of Photo-tunable Ferromagnetic Ultrathin-films with Perpendicular Magnetic Anisotropy. (2009)
  • Author(s): M. Suda, Y. Einaga
  • Journal Title: Angew. Chem. Int. Ed. 48 Pages: 1754-1757
  • Peer Reviewed
• [Journal Article] Photo-Control of Adhesion Properties by Detachment of the Outermost Layer in Layer-by-Layer Assembled Multilayer Films of Preyssler-Type Polyoxometalate and Polyethyleneimine. (2009)
  • Author(s): Y. Nagaoka, S. Shiratori, Y. Einaga
  • Journal Title: Chem. Mater. 20 Pages: 4004-4010
  • Peer Reviewed
• [Journal Article] Size Reduction Induced Ferromagnetism and Photo-magnetic Effects In Azobenzene-thiol-passivated Gold Nanoparticles (2009)
  • Author(s): M. Suda, Y. Einaga, et al.
  • Journal Title: Polyhedron (掲載決定)
  • Peer Reviewed
• [Journal Article] Reversible Photo-tuning of ex-nihilo Ferromagnetism Appeared at Au-S Interfaces at Room Temperature (2008)
  • Author(s): M. Suda, N. Kameyama, M. Suzuki, N. Kawamura, Y. Einaga
  • Journal Title: Angew. Chem. Int. Ed. 47 Pages: 160-163
  • Peer Reviewed
• [Journal Article] Photo-Control of Adhesion Properties by Detachment of the Outermost Layer in Layer-by-Layer Assembled Multilayer Films of Preyssler-Type Polyoxometalate and Polyethyleneimine (2008)
  • Author(s): Y. Nagaoka, S. Shiratori , Y. Einaga
  • Journal Title: Chem. Mater 20 Pages: 4004-4010
  • Peer Reviewed
• [Journal Article] Reversible Photo-switching of Ferromagnetic FePt Nanoparticles at Room Temperature (2007)
  • Author(s): M. Suda, M. Nakagawa, T. Iyoda, Y. Einaga
  • Journal Title: J. Am. Chem. Soc. 129 Pages: 5538-5543
  • Peer Reviewed
• [Journal Article] 57Fe Mossbauer, UV-visible, and FT-IR Study on Photoinduced Spin Transition of FeII-Triazole Complex (2007)
  • Author(s): T. Mitsuoka, M. Nakagawa, T. Iyoda, Y. Einaga
  • Journal Title: J. Nucl. Radiochem. Sci. 8 Pages: 1-3
  • Peer Reviewed
• [Journal Article] Photochromism induced magnetization changes in prussian blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and deoxyribonucleic acid (2007)
  • Author(s): T. Yamamoto, Y. Umemura, M. Nakagawa, T. Iyoda, Y. Einaga
  • Journal Title: Thin Solid Films 515 Pages: 5476-5483
  • Peer Reviewed
• [Journal Article] Reversible Photo-switching of Ferromagnetic FePt Nanoparticles at Room Temperature (2007)
  • Author(s): M.Suda, M.Nakagawa, T.Iyoda, Y.Einaga
  • Journal Title: J. Am. Chem. Soc (印刷中)
• [Journal Article] ^<57>Fe Mossbauer, UV-visible, and FT-TR Study on Photoinduced Spin Transition of Fell-Triazole Complex (2007)
  • Author(s): T.Mitsuoka, M.Nakagawa, T.Iyoda, Y.Einaga
  • Journal Title: J. Nucl. Radiochem. Sci. (印刷中)
• [Journal Article] Photochromism induced magnetization changes in prussian blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and deoxyribonucleic acid (2007)
  • Author(s): T.Yamamoto, Y.Umemura, M.Nakagawa, T.Iyoda, Y.Einaga
  • Journal Title: Thin Solid Films (印刷中)
• [Journal Article] Photo-switching magnetic materials (2006)
  • Author(s): Y. Einaga
  • Journal Title: J. Photochem. Photobio. C 7 Pages: 69-88
  • NAID: 10019275506
  • Peer Reviewed
• [Journal Article] Photomodulation of a Chiral Nematic Liquid Crystal by the Use of a Photoresponsive Ruthenium(III) Complex (2006)
  • Author(s): T. Mitsuoka, H. Sato, J. Yoshida, A. Yamagishi, Y. Einaga
  • Journal Title: Chem. Mater. 18 Pages: 3442-3447
  • Peer Reviewed
• [Journal Article] Photo-controlled Magnetization of CdS-Modified Prussian Blue Nanoparticles (2006)
  • Author(s): M. Taguchi, I. Yagi, M. Nakagawa, T. Iyoda, Y. Einaga
  • Journal Title: J. Am. Chem. Soc. 128 Pages: 10978-10982
  • Peer Reviewed
• [Journal Article] Photo-switching magnetic materials (2006)
  • Author(s): Y.Einaga
  • Journal Title: J. Photochem. Photobio. C 7 Pages: 69-88
  • NAID: 10019275506
• [Journal Article] Photomodulation of a Chiral Nematic Liquid Crystal by the Use of a Photoresponsive Ruthenium(III) Complex. (2006)
  • Author(s): T.Mitsuoka, H.Sato, J.Yoshida, A.Yamagishi, Y.Einaga
  • Journal Title: Chem. Mater. 18 Pages: 3442-3447
• [Journal Article] Photo-controlled Magnetization of CdS-Modified Prussian Blue Nanoparticles (2006)
  • Author(s): M.Taguchi, I.Yagi, M.Nakagawa, T.Iyoda, Y.Einaga
  • Journal Title: J. Am. Chem. Soc 128 Pages: 10978-10982
• [Presentation] 自己組織化有機単分子膜による超伝導特性の制御と光機能化 (2009)
  • Author(s): 池上彩, 須田理行, 渡辺剛志, A. Wheni, 栄長泰明
  • Organizer: 日本化学会第89春季年会
  • Place of Presentation: 日本大学理工学部
  • Year and Date: 2009-03-27
• [Presentation] Photo-switchable Magnetic Thin Films with Large Perpendicular Mangnetic Anisotropy at Room Temperature (2008)
  • Author(s): Y. Einaga, M. Suda
  • Organizer: The 5^<th> Asian Photochemistry Conference
  • Place of Presentation: 中国・北京
  • Year and Date: 2008-11-01
• [Presentation] フォトクロミック分子を利用したAu-S界面における光磁気効果のデザイン (2008)
  • Author(s): 須田理行・鈴木基寛・河村直己・栄長泰明
  • Organizer: 光化学討論会
  • Place of Presentation: 大阪
  • Year and Date: 2008-09-11
• [Presentation] フォトクロミック分子を利用したAu-S界面における光磁気効果のデザイン (2008)
  • Author(s): 須田理行・栄長泰明, ほか
  • Organizer: 2008年光化学討論会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2008-09-11
• [Presentation] Reversible Photo-tuning of Ferromagnetism Appeared at Au-S Interfaces (2007)
  • Author(s): Masayuki Suda, Yasuaki Einaga
  • Organizer: ISOP (International Symposium on Photochromism)
  • Place of Presentation: Canada
  • Year and Date: 2007-10-07
• [Presentation] Au-S結合界面に発現する強磁性と界面電荷移動に基づく光制御 (2007)
  • Author(s): 須田理行・鈴木基寛・河村直己・栄長泰明
  • Organizer: 光化学討論会
  • Place of Presentation: 長野
  • Year and Date: 2007-09-28
• [Presentation] Reversible Photo-switching of Ferromagnetic FePt Nanoparticles at Room Tempearture (2006)
  • Author(s): Yasuaki Einaga, Masayuki Suda, Tomokazu Iyoda
  • Organizer: 10th Internationl Conference on Molecule-based Magnets
  • Place of Presentation: Victoria, Canada
  • Year and Date: 2006-08-14
• [Presentation] Photocontrollable Magnetic Ultrathin Films Consisting of Azobenzene and Polyoxometalate (2006)
  • Author(s): Takashi Yamamoto, Naoki Saso, Yasushi Umemura, Masaru Nakagawa, Tomokazu Iyoda, Yasuaki Einaga
  • Organizer: 10th Internationl Conference on Molecule-based Magnets
  • Place of Presentation: Victoria, Canada
  • Year and Date: 2006-08-14
• [Presentation] Photocontrollable CdS-Modified Prussian Blue Nanoparticles (2006)
  • Author(s): Minori Taguchi, Ichizo Yagi, Masaru Nakagawa, Tomokazu Iyoda, Yasuaki Einaga
  • Organizer: 10th Internationl Conference on Molecule-based Magnets
  • Place of Presentation: Victoria, Canada
  • Year and Date: 2006-08-14
• [Remarks] 日本経済新聞掲載「慶大が新ナノ粒子」2007年1月19日
• [Remarks]
  • URL: http://www.educ.cc.keio.ac.jp/~einaga/gyoseki.html