Development for novel ferromagnetic non-equilibrium materialsand search for magnetic interactions

• Project/Area Number: 23654112
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: ENDOH Yasuo 東北大学, 金属材料研究所, 名誉教授 (00013483)
• Co-Investigator(Kenkyū-buntansha): HIRAKA Haruhiro 東北大学, 金属材料研究所, 助教 (90323097) ; ITOH Keiji 岡山大学, 大学院・教育学研究科, 准教授 (80324713)
• Co-Investigator(Renkei-kenkyūsha): OHOYAMA Kenji 東北大学, 金属材料研究所, 准教授 (60241569) ; SATO Toyoto 東北大学, 金属材料研究所, 助教 (20455851) ; ITOH Shinichi 高エネルギー加速器研究機構, 物質構造研究所, 教授 (00221771)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: スピントロニクス / 強磁性半導体 / 中性子非弾性散乱 / 新奇強磁性 / 非平衡合成 / メカニカルミリング / 中性子散乱 / 非並行合成

Research Abstract

The major goal of this project is to measure directly the ferromagnetic interactions in the ferromagnetic materials for the spintronics devices. Bulk materials mandatory for this specific purpose have been developed to be grown in the nonequilibrium condition by the mechanical milling method. At the same time, new neutron scattering method to measure spin wave scattering from powder materials has been completed by combining pulsed neutrons and high resolution chopper instrument installed at J-PARC.

Research Products

• [Journal Article] Neutrons Brillouin Scattering with Pulsed Spallation Neutron Source - Spin-Wave Excitations from Ferromagnetic Powder Samples - (2013)
  • Author(s): S. Itoh, Y. Endoh, T. Yokoo, D. Kawana, Y. Kaneko, Y. Tokura and M. Fujita
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Issue: 4 Pages: 43001-43001
  • DOI: 10.7566/jpsj.82.043001
  • NAID: 40019628750
  • Peer Reviewed
• [Journal Article] Neutron Brillouin scattering with pulsed spallation neutron source - spin-wave excitations from ferromagnetic powder samples - (2013)
  • Author(s): S. Itoh, Y. Endoh, T. Yokoo, D. Kawana, Y. Kaneko, Y.Tokura, M. Fujita
  • Journal Title: J. Phys. Soc. Jpn. Volume: in press
  • Peer Reviewed
• [Journal Article] Electronic excitations around the substituted atom in La_2Cu_<1-y> Ni_yO_4 as seen via resonant inelastic x-ray scattering (2012)
  • Author(s): K. Ishii, K. Tsutsui, K. Ikeuchi, I. Jarrige, J. Mizuki, H. Hiraka, K. Yamada, T. Tohyama, S. Maekawa, Y. Endo, H. Ishii, and Y. Q. Cai
  • Journal Title: Physical Review B Volume: 85 Issue: 10 Pages: 104509-104509
  • DOI: 10.1103/physrevb.85.104509
  • Peer Reviewed
• [Presentation] XAFS study on Ir- dimer formation across the metal- insulator transition in Ir sulfides (2012)
  • Author(s): H. Hiraka and D. Matsumura
  • Organizer: Summit of Materials Science (SMS2012)
  • Place of Presentation: Sendai
  • Year and Date: 2012-11-26
• [Presentation] Magnetic Brillouin Neutron Scattering on High Resolution Chopper Spectrometer (HRC) (2012)
  • Author(s): S. Itoh, T. Yokoo, D. Kawana, and Y.Endoh
  • Organizer: 10th International Conference on Quasielastic NeutronScattering
  • Place of Presentation: Nikko
  • Year and Date: 2012-10-02
• [Presentation] Magnetic Brillouin Neutron Scattering on High Resolution Chopper Spectrometer (HRC) (2012)
  • Author(s): S. Itoh, T. Yokoo, D. Kawana, and Y. Endoh
  • Organizer: 10th International Conference on Quasielastic Neutron Scattering
  • Place of Presentation: Nikko
• [Presentation] XAFS study on Ir-dimer formation across the metal-insulator transition in Ir sulfides (2012)
  • Author(s): Summit of Materials Science (SMS2012)
  • Organizer: H. Hiraka and D. Matsumura
  • Place of Presentation: Sendai
• [Book] 中性子散乱 (2012)
  • Author(s): 遠藤康夫
  • Total Pages: 220
  • Publisher: 朝倉書店