Studies on quantum and frustrated spin systems by ultra-low temperature high-field multi-frequency ESR

• Project/Area Number: 20340089
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Osaka University
• Principal Investigator: HAGIWARA Wasayuki Osaka University, 極限量子科学研究センター, 教授 (10221491)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000); Fiscal Year 2010: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2009: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2008: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
• Keywords: 磁気共鳴 / 極低温 / 強磁場 / 多周波数 / 量子磁性体 / フラストレート磁性体 / ダイリューション冷凍機 / 極低温ESR / 擬一次元反強磁性体 / 量子スピン系 / フラストレーション系

Research Abstract

We have developed high magnetic field multi-frequency electron spin resonance (ESR) apparatuses that can measure down to 0.1K in a static magnetic field and down to 0.6K in a pulsed magnetic field to study two kinds of magnets with remarkable quantum effects and competing exchange interactions. We have found novel ESR signals above a critical field where the energy gap vanishes which were not observed at the temperatures down to 1.3K for the former, and the shift of an ESR resonance field for the latter.

Research Products

• [Journal Article] High-Field ESR and Magnetism of the Triangular Lattice Antiferromagnet NiGa2S4 (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Journal Title: Journal of the Physical Society of Japan 79巻
  • NAID: 40017104684
  • Peer Reviewed
• [Journal Article] Antiferromagnetic resonance study of sodalite loaded with sodium by multi-frequency ESR (2010)
  • Author(s): T. Kashiwagi, 萩原政幸, et al.
  • Journal Title: Journal of Physics and Chemistry of Solids 71巻 Pages: 544-547
  • Peer Reviewed
• [Journal Article] Electron Spin Resonance in a New Triangular-Lattice Layered Oxide (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series 200巻
  • Peer Reviewed
• [Journal Article] Multi-frequency ESR studies on a Haldane magnet in a field-induced phase at ultra-low temperatures (2010)
  • Author(s): 萩原政幸, et al.
  • Journal Title: Journal of Physics : Conference Series 200巻
  • Peer Reviewed
• [Journal Article] High frequency ESR measurements on the spin crossover complex [MnIII(taa)] (2010)
  • Author(s): S.Kimura, M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series 200巻
  • Peer Reviewed
• [Journal Article] フラストレーションがつくる新しい物性 第5 回幾何学的フラストレート磁性体を強磁場中においたら (2010)
  • Author(s): 萩原政幸
  • Journal Title: 物理化学雑誌「パリティ」 5巻 Pages: 64-67
• [Journal Article] Spiral-spin flop probed by ESR in the multiferroic triangular-lattice antiferromagnet CuCrO2 (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Journal Title: Physical Review B 81巻
  • Peer Reviewed
• [Journal Article] High-Field ESR and Magnetization of the Triangular Lattice Antiferro-magnet NiGa-2S-4 (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Journal Title: Journal of the Physical Society of Japan Volume: 79
  • NAID: 40017104684
  • Peer Reviewed
• [Journal Article] Antiferromagnetic resonance study of sodalite loaded with sodium by multi-frequency ESR (2010)
  • Author(s): T.Kashiwagi, M.Hagiwara, et al.
  • Journal Title: Journal of Physics and Chemistry of Solids Volume: 71 Pages: 544-547
  • Peer Reviewed
• [Journal Article] Electron Spin Resonance in a New Triangular-Lattice Layered Oxide (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series Volume: 200
  • Peer Reviewed
• [Journal Article] Multi-frequency ESR studies on a Haldane magnet in a field-induced phase at ultra-low temperatures (2010)
  • Author(s): M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series Volume: 200
  • Peer Reviewed
• [Journal Article] High frequency ESR measurements on the spin crossover complex [Mn^<III>(taa)] (2010)
  • Author(s): S.Kimura, M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series Volume: 200
  • Peer Reviewed
• [Journal Article] フラストレーションがつくる新しい物性第5回幾何学的フラストレート磁性体を強磁場中においたら? (2010)
  • Author(s): 萩原政幸
  • Journal Title: 物理科学雑誌「パリティ」 Volume: 5 Pages: 64-67
• [Journal Article] Spiral-plane flop probed by ESR in the multifbrroic triangular-lattice antiferromagnet CuCrO_2 (2010)
  • Author(s): H.Yamaguchi, et al.
  • Journal Title: Physical Review B 81
  • Peer Reviewed
• [Journal Article] High-Field Magnetism of the Spin-Ladder Material Na_2Fe_2(C_2O_4)_3(H_2O)_2 (2009)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Journal Title: Journal of the Physical Society Japan 78巻
  • Peer Reviewed
• [Journal Article] Development of an Ultra-Low Temperature Multi-Frequency ESR Apparatus (2009)
  • Author(s): 萩原政幸, et al.
  • Journal Title: Journal of Physics : Conference Series 150巻
  • Peer Reviewed
• [Journal Article] Multi-Frequency ESR in the Haldane Magnet NDMAP below 1 K (2009)
  • Author(s): T.Kashiwagi, M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series 150巻
  • Peer Reviewed
• [Journal Article] Low Temperature Magnetism of the S=1/2 quasi one-dimensional Ising-like antiferromagnet BaCoV2O8 (2009)
  • Author(s): S.Kimura, M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series 150巻
  • Peer Reviewed
• [Journal Article] High-Field Magnetism of the Spin-Ladder Material Na_2Fe_2(C_2O_4)_3(H_2O)_2 (2009)
  • Author(s): H.Yamaguchi, et al.
  • Journal Title: Journal of the Physical Society of Japan 78
  • Peer Reviewed
• [Journal Article] Development of an Ultra-Low Temperature Multi-Frequency ESR Apparatus (2009)
  • Author(s): M.Hagiwara, et al.
  • Journal Title: Journal of Physics : Conference Series 150
  • Peer Reviewed
• [Journal Article] Multi-frequency ESR in the Haldane magnet NDMAP below 1K (2009)
  • Author(s): T.Kashiwagi, et al.
  • Journal Title: Journal of Physics : Conference Series 150
  • Peer Reviewed
• [Journal Article] Low temperature magnetism of the S=1/2 quasi one-dimensional Ising-like antiferromagnet BaCo_2V_2O_8 (2009)
  • Author(s): S.Kimura, et al.
  • Journal Title: Journal of Physics : Conference Series 150
  • Peer Reviewed
• [Presentation] ESR in a Disordered Network of Nanographe Sheets (2010)
  • Author(s): 萩原政幸
  • Organizer: The Horiba-19th International Conference on The Application of High Magnetic Fields in Semiconductor Physics and Nanotchnology
  • Place of Presentation: Fukuoka
  • Year and Date: 2010-08-03
• [Presentation] Electron Spin Resonance in the Quasi-Two-Dimensional Triangular-Lattice Antiferromagnet Rb_4Mn(MoO_4)_3 (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Organizer: Highly Frustrated Magnetism 2010
  • Place of Presentation: Baltimore, USA
  • Year and Date: 2010-08-03
• [Presentation] ESR in a Disordered Network of Nanographene Sheets (2010)
  • Author(s): M.Hagiwara
  • Organizer: The Horiba-19th International Conference on The Application of High Magnetic Fields in Semiconductor Physics and Nanotechnology
  • Place of Presentation: Fukuoka
  • Year and Date: 2010-08-03
• [Presentation] Electron Spin Resonance in the Quasi-Two-Dimensional Triangular-Lattice Antiferromagnet Rb4Mn(MoO_4)_3 (2010)
  • Author(s): H.Yamaguchi, M.Hagiwara, et al.
  • Organizer: Highly Frustrated Magnetism 2010
  • Place of Presentation: Baltimore, USA
  • Year and Date: 2010-08-03
• [Presentation] High-Field Studies on Geometrically Frustrated Spin Systems at KYOKUGEN (2010)
  • Author(s): 萩原政幸
  • Organizer: International Conference on Core Research and Engineering Science of Advanced Materials
  • Place of Presentation: Suita, Osaka
  • Year and Date: 2010-06-03
• [Presentation] Multi-frequency ESR studies on a Haldane magnet in a field-induced phase at ultra-low temperatures (2009)
  • Author(s): 萩原政幸, et al.
  • Organizer: The International Conference on Magnetism 2009
  • Place of Presentation: Karlsruhe, Germany
  • Year and Date: 2009-08-30
• [Presentation] Multi-frequency ESR studies on a Haldane magnet in a field-induced phase atultra-low temperatures (2009)
  • Author(s): M.Hagiwara
  • Organizer: The International Conference on Magnetism 2009
  • Place of Presentation: Karlsruhe, Germany
  • Year and Date: 2009-08-30
• [Presentation] Exotic phases in quantum and frustrated spin systems (2009)
  • Author(s): 萩原政幸
  • Organizer: Spin Waves 2009
  • Place of Presentation: St. Petersburg, Russia
  • Year and Date: 2009-06-09
• [Presentation] 量子磁性体の極低温強磁場多周波ESR II (2009)
  • Author(s): 柏木隆成、萩原政幸, 他
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] 量子磁性体の極低温強磁場多周波ESR II (2009)
  • Author(s): 柏木隆成, 他4名
  • Organizer: 日本物理学会第6 4回年次大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] 量子磁性体の極低温強磁場多周波ESR (2008)
  • Author(s): 柏木隆成、萩原政幸, 他
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-21
• [Presentation] Multi-Frequency ESR in the Haldane Magnet NDMAP below 1 K (2008)
  • Author(s): 柏木隆成, 萩原政幸, et al.
  • Organizer: Low Temperature Physics Conference LT15
  • Place of Presentation: RAI Conference Center, The Netherlands
  • Year and Date: 2008-08-11
• [Presentation] Multi-Frequency ESR in the Haldane magnet NDMAP belowl K (2008)
  • Author(s): T. Kashiwagi, 他5名
  • Organizer: Low Temperature Physics Conference LT25
  • Place of Presentation: RAI Conference Center, The Netherlands
  • Year and Date: 2008-08-11
• [Presentation] Development of an Ultra-Low Temperature Multi-Frequency ESR apparatus (2008)
  • Author(s): 萩原政幸, et al
  • Organizer: Low Temperature Physics Conference LT15
  • Place of Presentation: RAI Conference Center, The Netherlands
  • Year and Date: 2008-08-09
• [Presentation] Development of an U1tra-Low Temperature Multi-Frequency ESR Apparatus (2008)
  • Author(s): M. Hagiwara, 他5名
  • Organizer: Low Temperature Physics Conference LT25
  • Place of Presentation: RAI Conference Center, The Netherlands
  • Year and Date: 2008-08-09
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