Real time observation of non-equilibrium spin system by means of time resolved neutron scattering technique

• Project/Area Number: 18540357
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tokyo University of Science
• Principal Investigator: MOTOYA Kiyoichiro Tokyo University of Science, 理工学部, 教授 (60114683)
• Co-Investigator(Kenkyū-buntansha): MURO Yuji 東京理科大学, 理工学部, 助教 (50385530)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,970,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥570,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2006: ¥1,500,000 (Direct Cost: ¥1,500,000)
• Keywords: スピングラス / 中性子散乱 / 時間分割測定 / 非平衡系 / スローダイナミックス / スローダイナミック / 磁気秩序 / 磁性

Research Abstract

「強磁性・反強磁性相関の空間的共存状態とその時間変化」の解明を磁化率・比熱などの巨視的測定と、中性子散乱測定により行なった。Fe65(Ni_(1-x)Mn_x)35 系において強磁性的・反強磁性的磁気クラスターが空間的に分離して存在する事、強磁性的クラスターはその大きさに応じて順次強磁性ネットワークに吸収され消滅する事などが結論された。また、重い電子系物質CeIr3Si2において規則構造をもつ3次元磁性体では極めて異常な長時間磁気構造変化を検出した。この現象の解明を目指す研究は平成21-23 年度基盤研究として採択された

Research Products

• [Journal Article] Magnetic Field Dependence of Magnetic Clusters in the Random Magnet Fe65(Ni0.78Mn0.22)35 (2009)
  • Author(s): K. Motoya, Y. Muro and T. Igarashi
  • Journal Title: J. Phys. Soc. Jpn. 78
  • NAID: 130005437447
  • Peer Reviewed
• [Journal Article] Antiferromagnetism and Crystalline Electric Field Effect of Ce_2Pt_3Si_5 (2008)
  • Author(s): Y. Muro, M. Nakano and K. Motoya
  • Journal Title: J. Phys. Soc. Jpn. 77
  • NAID: 110007021682
  • Peer Reviewed
• [Journal Article] Single-crystal study of new compound Ce_2Pt_3Si_5 (2008)
  • Author(s): Y. Muro, M. Nakano and K. Motoya
  • Journal Title: Physica B 403 Pages: 810-811
  • Peer Reviewed
• [Journal Article] Single-crystal study of new compound Ce_2Pt_3Si_5 (2008)
  • Author(s): Y. Muro, M. Nakano, K. Motoya
  • Journal Title: Physica B 403 Pages: 810-811
  • Peer Reviewed
• [Journal Article] Quantum Phase Transition in the Itinerant Antiferromagnet (V_0.9Ti0.1)_2O_3 (2008)
  • Author(s): H. Kadowaki, et al.
  • Journal Title: Phys. Rev. Letters 101
  • Peer Reviewed
• [Journal Article] Antiferromagnetism and Crystalline Electric Field Effect of Ce_2Pt_3Si_5 (2008)
  • Author(s): Y. Muro, M. Nakano, K. Motoya
  • Journal Title: J. Phys. Soc. Jpn. 77
  • NAID: 110007021682
  • Peer Reviewed
• [Journal Article] Easy-plane magnetocrystalline anisotropy in the multi-step metamagnet CeIr_3Si_2 (2007)
  • Author(s): K. Shigetoh, A. Ishida, Y. Ayabe, T. Onimaru, K. Umeo, Y. Muro, K. Motoya, M. Sera and T. Takabatake
  • Journal Title: Phys. Rev. B 76
  • Peer Reviewed
• [Journal Article] Multi-step metamagnetism in CeIr3Si2 (2007)
  • Author(s): Y. Muro, Y. Ohno, T. Okada and K. Motoya
  • Journal Title: J. Mag. Mag. Mater 310 Pages: 389-390
  • Peer Reviewed
• [Journal Article] Heavy-fermion behavior in a new Ce compound CeRh_2Si (2007)
  • Author(s): Y. Muro, S. Takahashi, K. Sunahara, K. Motoya, M. Akatsu and N. Shirakawa
  • Journal Title: J. Mag. Mag. Mater 310
  • Peer Reviewed
• [Journal Article] Heavy-fermion behavior in CeRh2Si (2007)
  • Author(s): Y. Muro, et. al.
  • Journal Title: J. Mag. Mag. Mater. 310
  • Peer Reviewed
• [Journal Article] Multi-step metamagnetism in CeIr3Si2 (2007)
  • Author(s): Y. Muro, et. al.
  • Journal Title: J. Mag. Mag. Mater. 310 Pages: 389-390
  • Peer Reviewed
• [Journal Article] Easy-plane magnetocrystalline anisotropy in the multistep metamagnet (2007)
  • Author(s): K. Shigetoh, et. al.
  • Journal Title: Physical Review B 76
  • Peer Reviewed
• [Presentation] Real-Time Observation of Magnetic Structural Change in the Multistep Metamagnet CeIr3Si2 (2009)
  • Author(s): K.Motoya, Y. Muro and T. Takabatake
  • Organizer: International Conference on Neutron Scattering 2009
  • Place of Presentation: Knoxville, U.S.A.
  • Year and Date: 2009-05-04
• [Presentation] 多段メタ磁性体CeIr3Si2 における磁気構造の長時間変化 (2009)
  • Author(s): 元屋清一郎、室裕司、高畠敏郎
  • Organizer: 日本物理学会
  • Place of Presentation: 立教大学(東京)
  • Year and Date: 2009-03-28
• [Presentation] 多段メタ磁性体CeIr3Si2における磁気構造の長時間変化 (2009)
  • Author(s): 元屋清一郎, 他
  • Organizer: 日本物理学会
  • Place of Presentation: 立教大学(東京)
  • Year and Date: 2009-03-28
• [Presentation] パーコレーション濃度領域の (FexZn1-x)F2 における磁気励起 (2008)
  • Author(s): 元屋清一郎、室裕司、阿曽尚史, D.P.Belanger
  • Organizer: 日本物理学会
  • Place of Presentation: 近畿大学(大阪)
  • Year and Date: 2008-03-23
• [Presentation] Magnetic Field Dependence of Magnetic Correlations in the Random Magnet (2007)
  • Author(s): K.Motoya, Y. Muro and T.Igarashi
  • Organizer: Third Seeheim Conference on Magnetism
  • Place of Presentation: frankfurt, Germany
  • Year and Date: 2007-08-30
• [Presentation] Magnetic field dependence of magnetic clusters in the random magnet (2007)
  • Author(s): K. Motoya, et. al.
  • Organizer: Third Seeheim Conference of Magnetism
  • Place of Presentation: Frankfurt, Germany
  • Year and Date: 2007-08-30
• [Presentation] ランダム磁性体における異なる磁気相関の共存とその磁場変化 (2007)
  • Author(s): 元屋清一郎、室裕司、五十嵐得也
  • Organizer: 日本物理学会
  • Place of Presentation: 鹿児島大学(鹿児島)
  • Year and Date: 2007-03-18
• [Presentation] Magnetocrystalline anisotropy in the multi-step metamagnet CeIr3Si2 (2007)
  • Author(s): K.Shigetoh, A. Ishida, Y. Ayabe, T. Onimaru K. Umeo, M. Sera, T. Takabatake, Y. Muro and K. Motoya
  • Organizer: International Conference of Strongly Correlated Electron Systems
  • Place of Presentation: Houston, U.S.A.
• [Presentation] Single-crystal study of new compound Ce2Pt3Si5 (2007)
  • Author(s): Y. Muro , M. Nakano and K. Motoya
  • Organizer: International Conference of Strongly Correlated Electron Systems
  • Place of Presentation: Houston, U.S.A.
• [Presentation] eIr3Si2 における多段メタ磁性転移 (2006)
  • Author(s): 室裕司、矢吹俊博、大野泰明、岡田崇、元屋清一郎
  • Organizer: 日本物理学会
  • Place of Presentation: 千葉大学(千葉)
  • Year and Date: 2006-09-23
• [Presentation] Multi-step metamagnetism in CeIr3Si2 (2006)
  • Author(s): Y. Muro, Y. Ohno, T. Okada and K. Motoya
  • Organizer: International Conference on Magnetism
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2006-08-21
• [Remarks]
  • URL: http://www.rs.noda.sut.ac.jp/~motoya/index.html