Quantum phase and inelastic neutron scattering

• Project/Area Number: 19K03727
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: 伊藤 晋一 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (00221771)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Project Status: Completed (Fiscal Year 2023)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 金属磁性 / ベリー位相 / スピンカイラリティー / スピンダイナミクス / 磁気励起 / 中性子非弾性散乱 / 量子位相 / パルス中性子 / 固体物理学

Outline of Research at the Start

量子位相（ベリー位相）は、スピン、軌道、電荷等と並んで物性を支配する物理自由度と認知されるようになったが、その直接的検出が課題である。我々は、金属磁性体のスピン波の測定により、量子位相による仮想的磁場（ベリー曲率）が中性子非弾性散乱の観測量であることを発見した。この最初の実験に引き続き、異常ホール効果への量子位相の寄与が考えられるいくつかの系において、中性子非弾性散乱が一般的に量子位相を直接的に検出する実験手法であることを実証する。さらに、異常ホール効果の起源に対して論争のある系で、その決着を図る。

Outline of Annual Research Achievements

スピンカイラリティーが予想される金属反強磁性体FeMnでは、Fe0.5Mn0.5（磁気相転移温度TN=465.5K）とFe0.7Mn0.3（TN=412K）について、中性子非弾性散乱実験をTNより低温及び高温で広いエネルギー範囲で実施した。低温では、反強磁性スピン波の分散関係を示し、スピン波速度cは、エネルギーEとともに増大する。波数q=0ではcはTNでスケールされる。ギャップエネルギーが大きいことからスピンカイラリティーの存在が示唆される。励起のエネルギー幅はq方向はEに比例し、積分強度もEに比例し、これらは金属磁性体の振る舞いに一致する。E方向のエネルギー幅はcのE依存性に対応している。Fe0.7Mn0.3のエネルギー幅はFe0.5Mn0.5よりも大きいが、磁気モーメントの値の分布及びTNの大小関係から推定されてきたFe0.7Mn0.3のランダムネスの大きさが証明された。E>150meVの励起は、TNの上下で温度変化しないことから、個別励起であるストーナー励起であることが結論される。従来の研究では、スピン波とストーナー励起の相互作用が論じられてきたが、この実験はストーナー励起を単独で観測したものである。現在、出版準備中である。
研究期間全体では上述の最終年度研究実績に加えて、強磁性金属Nd2Mo2O7及び反強磁性金属Mn3Snの実験により、ベリー曲率の中性子非弾性散乱による検出が普遍的なものであることを示した。CeTe3及びCeTe2Seでは磁気異方性と反対称性スピン軌道相互作用との関係を議論した。この研究の中心的実験技術はJ-PARC MLFに設置された高分解能チョッパー分光器HRCによる中性子非弾性散乱であり、HRCの高性能化に向けた基礎研究をすすめとともに、クライオファーネスを整備して4-700Kの広い温度領域での中性子非弾性散乱実験を可能にした。

Research Products

• [Journal Article] Local structural change of V-T-Cr alloy hydrides dependent on hydrogen absorption/desorption cycles (2024)
  • Author(s): Kazutaka Ikeda, Sho Sashida, Toshiya Otomo, Hidetoshi Ohshita, Takashi Honda, Takafumi Hawai, Hiraku Saito, Shinichi Itoh, Tetsuya Yokoo, Kouji Sakaki, Hyunjeong Kim, Yumiko Nakamura, Akihiko Machida, Wojciech Slawinski
  • Journal Title: International Journal of Hydrogen Energy Volume: 51 Pages: 79-87
  • DOI: 10.1016/j.ijhydene.2023.10.318
  • Peer Reviewed
• [Journal Article] Field control of quasiparticle decay in a quantum antiferromagnet (2024)
  • Author(s): Shunsuke Hasegawa, Shinichiro Asai, Barry Winn, Shinichi Itoh, and Takatsugu Masuda
  • Journal Title: Nature Communications Volume: 15 Issue: 1
  • DOI: 10.1038/s41467-023-44435-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Sample environment of the HRC spectrometer at J-PARC (2024)
  • Author(s): D. Ueta, S. Itoh, T. Yokoo, T. Masuda, T. Nakajima, S. Asai, H. Saito, D. Kawana, R. Sugiura, T. Asami, Y. Ihata, H. Tanino, S. Yamauchi, and S. Torii
  • Journal Title: JPS Conf. Proc. Volume: 41
  • DOI: 10.7566/jpscp.41.011008
  • Peer Reviewed
• [Journal Article] Inelastic neutron scattering study of the eight-spin zigzag-chain compound KCu4P3O12: Confirmation of validity of the data-driven technique based on machine learning (2024)
  • Author(s): Masashi Hase, Ryo Tamura, Koji Hukushima, Shinichiro Asai, Takatsugu Masuda, Shinichi Itoh, and Andreas Donni
  • Journal Title: Phys. Rev. B Volume: 109 Issue: 9
  • DOI: 10.1103/physrevb.109.094434
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Multistep topological transitions among meron and skyrmion crystals in a centrosymmetric magnet (2024)
  • Author(s): Yoshimochi H.、Takagi R.、Ju J.、Khanh N. D.、Saito H.、Sagayama H.、Nakao H.、Itoh S.、Tokura Y.、Arima T.、Hayami S.、Nakajima T.、Seki S.
  • Journal Title: Nature Physics Volume: Advance online publications Issue: 6 Pages: 1-10
  • DOI: 10.1038/s41567-024-02445-9
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Neutron scattering study of dimerized 4f1 intermetallic compound Ce5Si3 (2024)
  • Author(s): Daichi Ueta, Yuki Iwata, Riki Kobayashi, Keitaro Kuwahara, Takatsugu Masuda, and Shinichi Itoh
  • Journal Title: Phys. Rev. B Volume: 109 Issue: 20 Pages: 205127-205135
  • DOI: 10.1103/physrevb.109.205127
  • Peer Reviewed
• [Journal Article] Inelastic Neutron Scattering in Weakly Coupled Triangular Spin Tubes CsCrF4 (2023)
  • Author(s): Hodaka Kikuchi, Shinichiro Asai, Hirotaka Manaka, Masato Hagihala, Shnichi Itoh, and Takatsugu Masuda
  • Journal Title: Phys. Rev. B Volume: 107 Issue: 18
  • DOI: 10.1103/physrevb.107.184405
  • Peer Reviewed
• [Journal Article] Direct observations of the spin fluctuations in hedgehog-anti-hedgehog spin lattice states in MnSi1-xGex (x = 0.6 and x = 0.8) (2023)
  • Author(s): Seno Aji, Tatsuro Oda, Yukako Fujishiro, Naoya Kanazawa, Hiraku Saito, Hitoshi Endo, Masahiro Hino, Shinichi Itoh, Taka-hisa Arima, Yoshinori Tokura, and Taro Nakajima
  • Journal Title: Phys. Rev. B Volume: 108 Issue: 5 Pages: 054445-054445
  • DOI: 10.1103/physrevb.108.054445
  • Peer Reviewed
• [Journal Article] In-plane anisotropy of the single-q and multiple-q ordered phases in the antiferromagnetic metal CeRh2Si2 (2023)
  • Author(s): Hiraku Saito, Fusako Kon, Hiroyuki Hidaka, Hiroshi Amitsuka, Cho Kwanghee, Masato Hagihala, Takashi Kamiyama, Shinichi Itoh, and Taro Nakajima
  • Journal Title: Phys. Rev. B Volume: 108 Issue: 9
  • DOI: 10.1103/physrevb.108.094440
  • Peer Reviewed
• [Journal Article] Q-dependent electron-phonon coupling induced phonon softening and non-conventional critical behavior in the CDW superconductor LaPt2Si2 (2023)
  • Author(s): E. Nocerino, U. Stuhr, I. San Lorenzo, F. Mazza, D.G. Mazzone, J. Hellsvik, S. Hasegawa, S. Asai, T. Masuda, S. Itoh, A. Minelli, Z. Hossain, A. Thamizhavel, K. Lefmann, Y. Sassa, M. Mansson
  • Journal Title: Journal of Science: Advanced Materials and Devices Volume: 8 Issue: 4 Pages: 100621-100621
  • DOI: 10.1016/j.jsamd.2023.100621
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Crystal electric field level scheme leading to giant magnetocaloric effect for hydrogen liquefaction (2023)
  • Author(s): Noriki Terada, Hiroaki Mamiya, Hiraku Saito, Taro Nakajima, Takafumi D. Yamamoto, Kensei Terashima, Hiroyuki Takeya, Osamu Sakai, Shinichi Itoh, Yoshihiko Takano, Masashi Hase, and Hideaki Kitazawa
  • Journal Title: Communications Materials Volume: 4 Issue: 1 Pages: 13-13
  • DOI: 10.1038/s43246-023-00340-z
  • Peer Reviewed / Open Access
• [Journal Article] Spin excitation in coupled honeycomb lattice Ni2InSbO6 (2023)
  • Author(s): Zheyuan Liu, Yusuke Araki, Taka-hisa Arima, Shinichi Itoh, Shinichiro Asai, and Takatsugu Masuda
  • Journal Title: Phys. Rev. B Volume: 107 Issue: 6
  • DOI: 10.1103/physrevb.107.064428
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Damped Dirac magnon in a metallic kagome; antiferromagnet FeSn (2022)
  • Author(s): Seung-Hwan Do, Matthew B. Stone, Koji Kaneko, Ryoichi Kajimoto, Kazuya Kamazawa, Shinichi Itoh, Takatsugu Masuda, German D. Samolyuk, William R. Meier, Brian C. Sales, Hu Miao, and Andrew D. Christianson
  • Journal Title: Phys. Rev. B Volume: 105 Issue: 18 Pages: 064704-064704
  • DOI: 10.1103/physrevb.105.l180403
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Anomalous magnetic moment direction under magnetic anisotropy originated from crystalline electric field in van der Waals compounds CeTe3 and CeTe2Se (2022)
  • Author(s): Daichi Ueta, Riki Kobayashi, Hiroki Sawada, Yuki Iwata, Shin-ichiro Yano, Shingo Kuniyoshi, Yuita Fujisawa, Takatsugu Masuda, Yoshinori Okada, and Shinichi Itoh
  • Journal Title: J. Phys. Soc. Jpn. Volume: 91 Issue: 9
  • DOI: 10.7566/jpsj.91.094706
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Antiferromagnetic Kitaev interaction in Jeff=1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6 (2022)
  • Author(s): Chaebin Kim, Jaehong Jeong, Gaoting Lin, Pyeongjae Park, Takatsugu Masuda, Shinichiro Asai, Shinichi Itoh, Heung-Sik Kim, Haidong Zhou, Jie Ma, Je-Geun Park,
  • Journal Title: J. Phys.: Condens. Matter Volume: 34 Issue: 4 Pages: 045802-045802
  • DOI: 10.1088/1361-648x/ac2644
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Crystalline Electric Field Level Scheme of Non-centrosymmetric CeRhSi3 and CeIrSi3 (2021)
  • Author(s): Ueta Daichi、Kobuke Tomohiro、Shibata Hiroki、Yoshida Masahiro、Ikeda Yoichi、Itoh Shinichi、Yokoo Tetsuya、Masuda Takatsugu、Yoshizawa Hideki
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 10 Pages: 104706-104706
  • DOI: 10.7566/jpsj.90.104706
  • NAID: 40022710311
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Field induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6 with small Kitaev interaction (2021)
  • Author(s): G. Lin, J. Jeong, Y. Wang, Q. Huang, T. Masuda, S. Asai, S. Itoh, G. Guenther, M. Russina, Z. Lu, J. Sheng, L. Wang, C. Kim, J. Wang, G. Wang, Q. Ren, C. Xi, W.Tong, L. Ling, Z. Liu, L. Wu, J. Mei, H. Zhou, Z. Qu, J.-G. Park, Y. Wan, and J. Ma
  • Journal Title: Nature Communications Volume: 12 Issue: 1
  • DOI: 10.1038/s41467-021-25567-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Origin of magnetovolume effect in a cobaltite (2021)
  • Author(s): P. Miao, Z. Tan, S. Lee, Y. Ishikawa, S. Torii, M. Yonemura, A. Koda, K. Komatsu, S. Machida, A. Sano-Furukawa, T. Hattori, X. Lin, K. Li, T. Mochiku, R. Kikuchi, C. Kawashima, H. Takahashi, Q. Huang, S. Itoh, R. Kadono, Y. Wang, F. Pan, K. Yamauchi and T. Kamiyama
  • Journal Title: Phys. Rev. B Volume: 103 Issue: 9 Pages: 094302-094302
  • DOI: 10.1103/physrevb.103.094302
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dynamical studies in condensed matter on High Resolution Chopper Spectrometer (HRC) - 2nd phase of HRC project - (2021)
  • Author(s): S. Itoh, T. Masuda, T. Yokoo, H. Yoshizawa, M. Soda, S. Asai, Y. Ikeda, S. Ibuka, M. Yoshida, T. Hawai, H. Saito, D. Kawana, R. Sugiura, T. Asami, Y. Ihata
  • Journal Title: JPS Conf. Proc. Volume: 33 Pages: 011058-011058
  • DOI: 10.7566/jpscp.33.011058
  • Peer Reviewed / Open Access
• [Journal Article] POLANO: Wide angle spin analysis using polarising supermirrors m = 5.5 (2020)
  • Author(s): M. Schneider, C. Schanzer, P. Boni, U. Filges, M. Fujita, Y. Nambu, M. Ohkawara, T. Yokoo, S. Itoh
  • Journal Title: Nucl. Instr. Meth. Phys. Res. A Volume: 976 Pages: 164272-164272
  • DOI: 10.1016/j.nima.2020.164272
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetic Correlation in YBaCo4O7 with Kagome and Triangular Lattices (2020)
  • Author(s): M. Soda, S. Itoh, T. Yokoo, G. Ehlers, H. Kawano-Furukawa, and T. Masuda
  • Journal Title: Phys. Rev. B Volume: 101 Issue: 21 Pages: 214444-214444
  • DOI: 10.1103/physrevb.101.214444
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Gapless spin liquid in a square-kagome lattice antiferromagnet (2020)
  • Author(s): M. Fujihala, K. Morita, R. Mole, S. Mitsuda, T. Tohyama, S. Yano, D. Yu, S. Sota, T. Kuwai, A. Koda, H. Okabe, H. Lee, S. Itoh, T. Hawai, T. Masuda, H. Sagayama, A. Matsuo, K. Kindo, S. Ohira-Kawamura, and K. Nakajima
  • Journal Title: Nature Communications Volume: 11 Issue: 1 Pages: 3429-3429
  • DOI: 10.1038/s41467-020-17235-z
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Noncoplanar ferrimagnetism and local crystalline-electric-field anisotropy in the quasicrystal approximant Au70Si17Tb13 (2020)
  • Author(s): T. Hiroto, T. J Sato, H. Cao, T. Hawai, T. Yokoo, S. Itoh, and R. Tamura
  • Journal Title: J. Phys.: Condens. Matter Volume: 32 Issue: 41 Pages: 415802-415802
  • DOI: 10.1088/1361-648x/ab997d
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spin-waves in 2D honeycomb lattice XXZ-type van der Waals antiferromagnet CoPS3 (2020)
  • Author(s): Chaebin Kim, Jaehong Jeong, Takatsugu Masuda, Shinichiro Asai, Shinichi Itoh, Heung-Sik Kim, Andrew Wildes, and Je-Geun Park
  • Journal Title: Spin-waves in 2D honeycomb lattice XXZ-type van der Waals antiferromagnet CoPS3 Volume: 102 Issue: 18 Pages: 184429-184429
  • DOI: 10.1103/physrevb.102.184429
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Helical and collinear spin-density-wave orders in S=1/2 one-dimensional frustrated chain compound NaCuMoO4(OH) investigated by neutron scattering (2020)
  • Author(s): S. Asai, T. Oyama, K. Nawa, A. Nakao, K. Munakata, K. Kuwahara, M. Hagihala, S. Itoh, Z. Hiroi, and T. Masuda
  • Journal Title: Phys. Rev. B Volume: 101 Issue: 14 Pages: 144437-144437
  • DOI: 10.1103/physrevb.101.144437
  • Peer Reviewed
• [Journal Article] Neutron Brillouin Scattering and Low-Q Dynamics in Condensed Matter (2019)
  • Author(s): S. Itoh and Y. Endoh
  • Journal Title: J. Phys. Soc. Jpn. Volume: 88 Issue: 8 Pages: 081004-081004
  • DOI: 10.7566/jpsj.88.081004
  • Peer Reviewed
• [Journal Article] Development of Compact High Field Pulsed Magnet System for New Sample Environment Equipment at MLF in J-PARC (2019)
  • Author(s): M. Watanabe, H. Nojiri, S. Itoh, S. Ohira-Kawamura, T. Kihara, T. Masuda, T. Sahara, M. Soda and R. Takahashi
  • Journal Title: JPS Conf. Proc. Volume: 25 Pages: 011024-011024
  • DOI: 10.7566/jpscp.25.011024
  • Peer Reviewed
• [Journal Article] Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3 (2019)
  • Author(s): Hayashida Shohei、Matsumoto Masashige、Hagihala Masato、Kurita Nobuyuki、Tanaka Hidekazu、Itoh Shinichi、Hong Tao、Soda Minoru、Uwatoko Yoshiya、Masuda Takatsugu
  • Journal Title: Science Advances Volume: 5 Issue: 10
  • DOI: 10.1126/sciadv.aaw5639
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Multi-step topological transitions among meron and skyrmion crystals in a centrosymmetric magnet (2024)
  • Author(s): H. Yoshimochi, R. Takagi, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, S. Itoh, Y. Tokura, T. Arima, S. Hayami, T. Nakajima, S. Seki
  • Organizer: International Symposium on Quantum Electronics
  • Int'l Joint Research
• [Presentation] Multi-step topological transitions among meron and skyrmion crystals in a centrosymmetric magnet (2024)
  • Author(s): H. Yoshimochi, R. Takagi, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, S. Itoh, Y. Tokura, T. Arima, S. Hayami, T. Nakajima, S. Seki
  • Organizer: CEMS Symposium on Emergent Quantum Materials 2024
  • Int'l Joint Research
• [Presentation] Neutron scattering studies for RMnO3 and RFeO3 in 2D-THA system (2023)
  • Author(s): Shinichiro Yano, Kazuki Iida, Daichi Ueta, Chinwei Wang, Wei-Tin Chen, Richard Mole, Jason S Gardner, Despina Louca, Shinichi Itoh
  • Organizer: International Conference on Strongly Correlated Electron Systems 2023 (SCES2023)
  • Int'l Joint Research
• [Presentation] 高分解能チョッパー分光器による物質のダイナミクスの研究 (2023)
  • Author(s): 伊藤晋一、益田隆嗣、植田大地、横尾哲也、中島多朗、浅井晋一郎、齋藤開、川名大地、杉浦良介、浅見俊夫、井畑良明、谷野弘明
  • Organizer: 日本中性子科学会第23回年会
• [Presentation] スピンダイマー形成化合物Ce5Si3の磁場中磁気励起 (2023)
  • Author(s): 植田大地、伊藤晋一、小林理気、桑原慶太郎、益田隆嗣
  • Organizer: 日本中性子科学会第23回年会
• [Presentation] 水素液化温度領域で巨大な磁気熱量効果を生み出す結晶場準位 (2023)
  • Author(s): 寺田典樹、間宮広明、斎藤開、中島多朗、山本貴史、寺嶋健成、竹屋浩幸、酒井治、伊藤晋一、高野義彦、長谷正司、北澤英明
  • Organizer: 日本中性子科学会第23回年会
  • Invited
• [Presentation] 磁鉄鉱の中性子非弾性散乱研究 (2023)
  • Author(s): Zheyuan Liu、浅井晋一郎、伊藤晋一、益田隆嗣
  • Organizer: 日本中性子科学会第23回年会
• [Presentation] Magnetic Structures of GdCo2B2 by Neutron Powder Diffraction (2023)
  • Author(s): S. R. Larsen, N. Terada, H. Mamiya, H. Saito, T. Nakajima, S. Itoh, and H. Kitazawa
  • Organizer: 日本中性子科学会第23回年会
• [Presentation] J-PARC MLFにおける窒素ガス充填の中性子ビームモニターのコミッショニング (2023)
  • Author(s): 大下英敏、横尾哲也、伊藤晋一、金子直勝、植田大地、本田孝志、大友季哉、瀬谷智洋
  • Organizer: 日本中性子科学会第23回年会
• [Presentation] スピンダイマー形成化合物Ce5Si3の磁気励起、 (2023)
  • Author(s): 磁気励起、植田大地、小林理気、桑原慶太郎、益田隆嗣、伊藤晋一
  • Organizer: 日本中性子科学会第23回年会
• [Presentation] 反強磁性体Mn3TaO8における中性子非弾性散乱実験 (2023)
  • Author(s): 菊地帆高、長谷川舜介、浅井晋一郎、木村健太、木村剛、伊藤晋一、益田隆嗣
  • Organizer: 日本物理学会第78回年次大会
• [Presentation] Inelastic Neutron Scattering Study on Magnetite, (2023)
  • Author(s): Zheyuan Liu, Shinichiro Asai, Shinichi Itoh, Takatsugu Masuda
  • Organizer: 日本物理学会第78回年次大会
• [Presentation] Spin dynamics in easy-plane antiferromagnet CsFeCl3 in magnetic fields (2023)
  • Author(s): Zijun Wei, Shinichiro Asai, Hodaka Kikuchi, Shinichi Itoh, Takatsugu Masuda
  • Organizer: 日本物理学会第78回年次大会
• [Presentation] 励起子絶縁体候補物質Pr0.5Ca0.5CoO3の中性子非弾性散乱研究 (2023)
  • Author(s): 三宅岳志、浅井晋一郎、伊藤晋一、益田隆嗣
  • Organizer: 日本物理学会2023年春季大会
• [Presentation] Neutron flux and energy resolution of the HRC spectrometer at J-PARC (2022)
  • Author(s): Daichi Ueta, Shinichi Itoh, Tetsuya Yokoo, Takatsugu Masuda, Taro Nakajima, Shinichiro Asai, Hiraku Saito, Daichi Kawana, Ryosuke Sugiura, Toshio Asami, Yoshiaki Ihata, Hiroaki Tanino
  • Organizer: The 15th Edition of the QENS series and the 10th of the WINS workshops
  • Int'l Joint Research
• [Presentation] Neutron scattering study on van der Waals ferromagnet Fe5-xGeTe2 (2022)
  • Author(s): Shinichiro Asai, Miyuki Fujiwara, Kohei Yamagami, Kenta Kuroda, Takeshi Kondo, Yoshinori Okada, Shinichi Itoh, Matthias Frontzek, Takatsugu Masuda
  • Organizer: International Conference on Neutron Scattering (ICNS2022)
  • Int'l Joint Research
• [Presentation] Inelastic neutron scattering study in Kagome-Triangular lattice CsCrF4 (2022)
  • Author(s): Hodaka Kikuchi, Shinichiro Asai, Hirotaka Manaka, Masato Hagihala, Shinichi Itoh, Takatsugu Masuda
  • Organizer: International Conference on Neutron Scattering (ICNS2022)
  • Int'l Joint Research
• [Presentation] Sample environment of the HRC spectrometer at J-PARC (2022)
  • Author(s): D. Ueta, S. Itoh, T. Yokoo, T. Masuda, T. Nakajima, S. Asai, H. Saito, D. Kawana, R. Sugiura, T. Asami, Y. Ihata, H. Tanino, S. Yamauchi
  • Organizer: 11th International Workshop on Sample Environment at Scattering Facilities (ISSE workshop 2022)
• [Presentation] スピンダイマー形成化合物Ce5Si3の中性子実験による磁気励起の研究 (2022)
  • Author(s): 植田大地、岩田由規、小林理気、桑原慶太郎、益田隆嗣、伊藤晋一
  • Organizer: 日本物理学会2022年秋季大会
• [Presentation] Spin fluctuations in a spin-hedgehog-anti-hedgehog lattice state in Mn(Si,Ge) under zero magnetic field (2022)
  • Author(s): S. Aji, T. Oda, Y. Fujishiro, N. Kanazawa, H. Saito, H. Endo, M. Hino, S. Itoh, T. Arima, Y. Tokura, T. Nakajima
  • Organizer: 日本物理学会2022年秋季大会
• [Presentation] 中性子散乱及び一軸応力下のバルク測定による金属反強磁性体CeRh2Si2のsingle-q/multi-q磁気相転移の研究 (2022)
  • Author(s): 齋藤開、今布咲子、日髙宏之、網塚浩、伊藤晋一、中島多朗
  • Organizer: 日本物理学会2022年秋季大会
• [Presentation] 三角格子反強磁性体RbFeCl3のマグノン崩壊とその回避 (2022)
  • Author(s): 益田隆嗣、長谷川舜介、浅井晋一郎、Barry Winn、伊藤晋一
  • Organizer: 日本物理学会2022年秋季大会
• [Presentation] Magnetism of pseudospin-1/2 pyrochlore antiferromagnet Na3Co(CO3)2Cl (2022)
  • Author(s): Kazuhiro Nawa, Ryo Murasaki, Clarina Dera Cluz, Shinichi Itoh, Hiraku Saito, Hiroyuki Nojiri, Daisuke Okuyama, Masahiro Yoshida, Daichi Ueta, Hideki Yoshizawa, and Taku J. Sato
  • Organizer: Neutron scattering on continuous sources - future developments, US-Japan workshop
• [Presentation] 高分解能チョッパー分光器による物質のダイナミクスの研究 (2022)
  • Author(s): 伊藤晋一、益田隆嗣、横尾哲也、中島多朗、植田大地、浅井晋一郎、齋藤開、川名大地、杉浦良介、浅見俊夫、井畑良明、谷野弘明
  • Organizer: 日本中性子科学会第22回年会
• [Presentation] 中性子非弾性散乱実験による異常な磁気応答を示すCeTe2Seの結晶場準位の研究 (2022)
  • Author(s): 植田大地、小林理気、澤田拓希、岩田由規、矢野真一郎、國吉真伍、藤沢唯太、益田隆嗣、岡田佳憲、伊藤晋一
  • Organizer: 日本中性子科学会第22回年会
• [Presentation] 中性子散乱及び一軸応力下のバルク測定による金属反強磁性体CeRh2Si2のsingle-q/multi-q磁気相転移の研究 (2022)
  • Author(s): 齋藤開、今布咲子、日髙宏之、網塚浩、伊藤晋一、中島多朗
  • Organizer: 日本中性子科学会第22回年会
• [Presentation] Spin fluctuations in spin-hedgehog-anti-hedgehog lattice states in Mn(Si,Ge) in zero magnetic field (2022)
  • Author(s): S. Aji, T. Oda, Y. Fujishiro, N. Kanazawa, H. Saito, H. Endo, M. Hino, S. Itoh, T. Arima, Y. Tokura, T. Nakajima
  • Organizer: 日本中性子科学会第22回年会
• [Presentation] Inelastic Neutron Scattering Study on a Helimagnet Ni2InSbO6 (2022)
  • Author(s): 劉哲源、荒木勇介、有馬孝尚、伊藤晋一、益田隆嗣
  • Organizer: 日本中性子科学会第22回年会
• [Presentation] Damped Dirac magnon in a metallic Kagome antiferromagnet FeSn (2022)
  • Author(s): Seung-Hwan Do, Koji Kaneko, Ryoichi Kajimoto, Kazuya Kamazawa, Matthew B. Stone, Shinichi Itoh, Takatsugu Masuda, German D. Samolyuk, Elbio Dagotto, William R. Meier, Brian C. Sales, Hu Miao, and Andrew D. Christianson
  • Organizer: 2022 APS March Meeting
• [Presentation] ファンデルワールス強磁性体Fe5-xGeTe2における磁気励起の解析 (2022)
  • Author(s): 藤原美幸、浅井晋一郎、山神光平、黒田健太、近藤猛、岡田佳憲、伊藤晋一、益田隆嗣
  • Organizer: 日本物理学会第77回年次大会
• [Presentation] Inelastic Neutron Scattering Study on a Helimagnet Ni2InSbO6 (2022)
  • Author(s): Zheyuan Liu, Yusuke Araki, Taka-hisa Arima, Shinichi Itoh, Takatsugu Masuda
  • Organizer: 日本物理学会第77回年次大会
• [Presentation] At last, an in-situ polarized 3He neutron spin filter has been installed on POLANO at J-PARC (2021)
  • Author(s): T. Ino, M. Ohkawara, N. Kaneko, K. Hayashi, T. Yokoo, S. Itoh, Y. Ikeda, M. Fujita
  • Organizer: Polarized Neutrons for Condensed Matter Investigations (PNCMI) 2021
  • Int'l Joint Research
• [Presentation] パイロクロア格子反強磁性体Na3Co(CO3)2Clの結晶場励起 (2021)
  • Author(s): 那波和宏、村崎遼、伊藤晋一、齋藤開、Clarina Dela Cruz、佐藤卓
  • Organizer: 日本物理学会2021年度秋季大会
• [Presentation] 反転対称性の破れたフェリ磁性体LiFe5O8の低エネルギースピン波励起 (2021)
  • Author(s): 柴田将弥、那波和宏、村崎遼、伊藤晋一、植田大地、佐藤卓
  • Organizer: 日本物理学会2021年度秋季大会
• [Presentation] ファンデルワールス強磁性体Fe5-xGeTe2の中性子散乱 (2021)
  • Author(s): 浅井晋一郎、藤原美幸、黒田健太、近藤猛、山神光平、岡田佳憲、伊藤晋一、益田隆嗣
  • Organizer: 日本物理学会2021年度秋季大会
• [Presentation] KENS instruments at J-PARC MLF (2021)
  • Author(s): S. Itoh
  • Organizer: KEK 50th Anniversary Symposium,
  • Int'l Joint Research
• [Presentation] 高分解能チョッパー分光器HRCによる物質のダイナミクスの研究 (2021)
  • Author(s): 伊藤晋一、益田隆嗣、横尾哲也、中島多朗、浅井晋一郎、齋藤開、植田大地、川名大地、杉浦良介、浅見俊夫、瀬谷智洋、井畑良明、谷野弘明
  • Organizer: 日本中性子科学会第21回年会
• [Presentation] 中性子非弾性散乱実験によるフラストレート系Ce5Si3の研究 (2021)
  • Author(s): 植田大地、岩田由規、小林理気、桑原慶太郎、益田隆嗣、伊藤晋一
  • Organizer: 日本中性子科学会第21回年会
• [Presentation] RbFeCl3において観測された縦/横揺らぎ混成モードにおけるマグノン崩壊の磁場依存性 (2021)
  • Author(s): 長谷川舜介、浅井晋一郎、松本正茂、Tao Hong、Barry Winn、伊藤晋一、益田隆嗣
  • Organizer: 日本中性子科学会第21回年会
• [Presentation] ファンデルワールス強磁性体Fe5-xGeTe2の中性子非弾性散乱 (2021)
  • Author(s): 浅井晋一郎、藤原美幸、山神光平、黒田健太、近藤猛、岡田佳憲、伊藤晋一、益田隆嗣
  • Organizer: v
• [Presentation] CeRh2Si2の非弾性中性子散乱と粉末中性子回折の結果について (2020)
  • Author(s): 齋藤開、羽合孝文、今布咲子、日髙宏之、網塚浩、益田隆嗣、神山崇、萩原雅人、鳥居周輝、Cho Kwanghee、横尾哲也、中島太朗、伊藤晋一
  • Organizer: 日本物理学会2020年度秋季大会
• [Presentation] カイラル磁性体MnGeのスピンヘッジホッグ・反ヘッジホッグ格子相における中性子小角非弾性散乱 (2020)
  • Author(s): 中島多朗、藤代有絵子、金澤直也、齋藤開、伊藤晋一、有馬孝尚、十倉好紀
  • Organizer: 日本物理学会2020年度秋季大会
• [Presentation] Au-Si-Tb 1/1 近似結晶の磁気構造と結晶場分裂 (2020)
  • Author(s): 佐藤卓、廣戸孝信、H. Cao、羽合孝文、横尾哲也、伊藤晋一、田村隆治
  • Organizer: 日本物理学会2020年度秋季大会
• [Presentation] 高分解能チョッパー分光器による物質のダイナミクスの研究 (2020)
  • Author(s): 伊藤晋一、益田隆嗣、横尾哲也、中島多朗、浅井晋一郎、齋藤開、植田大地、菊地帆高、長谷川舜介、川名大地、杉浦良介、浅見俊夫、井畑良明、谷野弘明
  • Organizer: 日本中性子科学会2020年第20回年会
• [Presentation] HRC分光器(BL12)における中性子小角非弾性散乱を用いたカイラル磁性体MnGeの磁気励起の研究 (2020)
  • Author(s): 中島多朗、藤代有絵子、金澤直也、齋藤開、伊藤晋一、有馬孝尚、十倉好紀
  • Organizer: 日本中性子科学会2020年第20回年会
• [Presentation] チョッパー分光器用軸立てシミュレーションアプリの開発 (2020)
  • Author(s): 川名大地、中島多朗、 浅井晋一郎、齋藤開、益田隆嗣、伊藤晋一
  • Organizer: 日本中性子科学会2020年第20回年会
• [Presentation] 高分解能チョッパー分光器による物質のダイナミクスの研究 (2020)
  • Author(s): 伊藤晋一、益田隆嗣、横尾哲也、中島多朗、浅井晋一郎、齋藤開、川名大地、杉浦良介、浅見俊夫、井畑良明、谷野弘明
  • Organizer: 2019年度量子ビームサイエンスフェスタ
• [Presentation] 金属反強磁性体CeRh2Si2の磁気励起の異方性 (2020)
  • Author(s): 齋藤開、羽合孝文、今布咲子、日髙宏之、網塚浩、益田隆嗣、横尾哲也、伊藤晋一
  • Organizer: 2019年度量子ビームサイエンスフェスタ
• [Presentation] マルチフェロイックTb2(MoO4)3の結晶場励起と磁気準弾性散乱 (2020)
  • Author(s): 鹿内文仁、羽合孝文、横尾哲也、伊藤晋一
  • Organizer: 2019年度量子ビームサイエンスフェスタ
• [Presentation] 偏極中性子散乱装置POLANOによる交差相関物理の解明 (2020)
  • Author(s): 横尾哲也、金子直勝、伊藤晋一、林浩平、猪野隆、齋藤開、Yu Feng、藤田全基、大河原学、池田陽一、南部雄介、谷口貴紀、奥隆之、奥平琢也、大山研司、小野寛太、羽合孝文
  • Organizer: 2019年度量子ビームサイエンスフェスタ
• [Presentation] POLANOにおけるオンビームコミッショニング (2020)
  • Author(s): 横尾哲也、金子直勝、伊藤晋一、林浩平、Yu Feng、藤田全基、大河原学、池田陽一
  • Organizer: 2019年度量子ビームサイエンスフェスタ
• [Presentation] J-PARC MLFの非弾性・準弾性中性子散乱装置 (2020)
  • Author(s): 梶本亮一、横尾哲也、中村充孝、川北至信、松浦直人、遠藤仁、瀬戸秀紀、伊藤晋一、中島健次、河村聖子
  • Organizer: 2019年度量子ビームサイエンスフェスタ
• [Presentation] CeRh2Si2における磁気励起の異方性 (2020)
  • Author(s): 齋藤開、横尾哲也、羽合孝文、益田隆嗣、今布咲子、日髙宏之、柳澤達也、網塚浩、伊藤晋一
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 菊地帆高、長谷川舜介、浅井晋一郎、伊藤晋一、益田隆嗣 (2020)
  • Author(s): 2次元反強磁性体Ba2MnGe2O7における磁場下中性子非弾性散乱実験
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] Suite of the Neutron Spectrometers in J-PARC (2019)
  • Author(s): T. Yokoo, R. Kajimoto, M. Nakamura, Y. Kawakita, M. Matsuura, H. Endo, H. Seto, S. Itoh, K. Nakajima, S. Ohira-Kawamura
  • Organizer: European Conference on Neutron Scattering (ECNS 2019)
  • Int'l Joint Research
• [Presentation] BL23 POLANOにおける偏極デバイスの現状 (2019)
  • Author(s): 大河原学、猪野隆、池田陽一、横尾哲也、藤田全基、伊藤晋一
  • Organizer: 東北大金研-CROSSワークショップ「J-PARCとJRR-3の相補利用による偏極中性子科学の新展開」
• [Presentation] 金属強磁性体Nd2Mo2O7のスピン波 (2019)
  • Author(s): 伊藤晋一、羽合孝文、斎藤開、横尾哲也、益田隆嗣、遠藤康夫、金子良夫、Max Hirschberger、永長直人、十倉好紀
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 金属反強磁性体CeRh2Si2の磁気励起II (2019)
  • Author(s): 齋藤開、羽合孝文、今布咲子、日高宏之、網塚浩、益田隆嗣、横尾哲也、伊藤晋一
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 量子臨界点近傍の三角格子反強磁性体RbFeCl3における準粒子励起 (2019)
  • Author(s): 長谷川舜介、浅井晋一郎、松本正茂、伊藤晋一、益田隆嗣
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] Magnon Excitations on a Metallic Antiferromagnet CeRh2Si2 (2019)
  • Author(s): H. Saito, T. Hawai, F. Kon, H. Hidaka, H. Amitsuka, T. Masuda, T. Yokoo, and S. Itoh
  • Organizer: J-Physics 2019 International Conference
  • Int'l Joint Research
• [Presentation] Berry Curvature Observed in Spin Waves in Nd2Mo2O7 (2019)
  • Author(s): S. Itoh, T. Hawai, H. Saito, T. Yokoo, T. Masuda, Y. Endoh, Y. Kaneko, M. Hirschberger, N. Nagaosa, Y. Tokura
  • Organizer: International Conference on Strongly Correlated Electron Systems 2019 (SCES 2019)
  • Int'l Joint Research
• [Presentation] Magnetic Excitation on a Metallic Antiferromagnet CeRh2Si2 (2019)
  • Author(s): H. Saito, T. Hawai, F. Kon, H. Hidaka, H. Amitsuka, T. Masuda, T. Yokoo, and S. Itoh
  • Organizer: International Conference on Strongly Correlated Electron Systems 2019 (SCES 2019)
  • Int'l Joint Research
• [Presentation] Inelastic Neutron Scattering in Kagome-Triangular Lattice CsCrF4 (2019)
  • Author(s): H. Kikuchi, M. Hagihala, H. Manaka, S. Asai, S. Itoh, and T. Masuda
  • Organizer: International Conference on Strongly Correlated Electron Systems 2019 (SCES 2019)
  • Int'l Joint Research
• [Presentation] Dynamical studies in condensed matters on High Resolution Chopper Spectrometer (HRC) - 2nd phase of HRC project - (2019)
  • Author(s): S. Itoh, T. Masuda, T. Yokoo, H. Yoshizawa, M. Soda, S. Asai, Y. Ikeda, S. Ibuka, M. Yoshida, T. Hawai, H. Saito, D. Kawana, R. Sugiura, T. Asami, Y. Ihata
  • Organizer: 3rd J-PARC Symposium (J-PARC2019)
  • Int'l Joint Research
• [Presentation] The New Spectrometer in MLF, POLANO (2019)
  • Author(s): T. Yokoo, Y. Ikeda, S. Itoh, M. Fujita, N. Kaneko, M. Ohkawara, T. Ino and K. Hayashi
  • Organizer: 3rd J-PARC Symposium (J-PARC2019)
  • Int'l Joint Research
• [Presentation] Suite of the Neutron Spectrometers in J-PARC MLF (2019)
  • Author(s): R. Kajimoto, T. Yokoo, M. Nakamura, Y. Kawakita, M. Matsuura, H. Endo, H. Seto, S. Itoh, K. Nakajima, S. Ohira-Kawamura
  • Organizer: 23rd Meeting of the International Collaboration on Advanced Neutron Sources (ICANS XXIII)
  • Int'l Joint Research
• [Presentation] Berry curvature observed in spin waves (2019)
  • Author(s): S. Itoh
  • Organizer: 1st Workshop on Inelastic Neutron Scattering in Asia
  • Int'l Joint Research / Invited
• [Presentation] Magnetic Excitations of Frustrated Quantum Spin Systems (2019)
  • Author(s): N. Kurita, K. Tanaka, S. Ito, H. Tanaka, D. Yamamoto, T. Kanesaka, N. Furukawa, S. Ohira-Kawamura, K. Nakajima, K. Nawa, T. J. Sato, S. Itoh, K. Kuwahara, and K. Kakurai
  • Organizer: 1st Workshop on Inelastic Neutron Scattering in Asia
  • Int'l Joint Research / Invited
• [Presentation] Berry Curvature Observed in Spin Waves in Nd2Mo2O7 (2019)
  • Author(s): S. Itoh, T. Hawai, H. Saito, T. Yokoo, T. Masuda, Y. Enodoh, Y. Kaneko, M. Hirschberger, N. Nagaosa, Y. Tokura
  • Organizer: 3rd Asia-Oceania Conference for Neutron Scattering (AOCNS 2019)
  • Int'l Joint Research
• [Presentation] Magnon Excitations on a Metallic Antiferromagnet CeRh2Si2 (2019)
  • Author(s): H. Saito, T. Hawai, F. Kon, H. Hidaka, H. Amitsuka, T. Masuda, T. Yokoo, and S. Itoh
  • Organizer: 3rd Asia-Oceania Conference for Neutron Scattering (AOCNS 2019)
  • Int'l Joint Research
• [Presentation] Dynamical studies in condensed matters on High Resolution Chopper Spectrometer (HRC) - 2nd phase of HRC project - (2019)
  • Author(s): S. Itoh, T. Masuda, T. Yokoo, H. Yoshizawa, M. Soda, S. Asai, Y. Ikeda, S. Ibuka, M. Yoshida, T. Hawai, H. Saito, D. Kawana, R. Sugiura, T. Asami, Y. Ihata
  • Organizer: 3rd Asia-Oceania Conference for Neutron Scattering (AOCNS 2019)
  • Int'l Joint Research
• [Presentation] Recent progress of the new spectrometer in MLF, POLANO (2019)
  • Author(s): T. Yokoo, Y. Ikeda, S. Itoh, M. Fujita, N. Kaneko, M. Ohkawara, T. Ino and K. Hayashi
  • Organizer: 3rd Asia-Oceania Conference for Neutron Scattering (AOCNS 2019)
  • Int'l Joint Research