Study on magnetic correlations in molecule-based magnets by inelastic neutron scattering using a chopper spectrometer

• Project/Area Number: 17K05129
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: Kawamura Seiko 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J－PARCセンター, 研究副主幹 (70360518)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 中性子非弾性散乱 / 分子磁性体 / 圧力効果 / 高圧下測定 / 中性子散乱 / 分子磁性

Outline of Final Research Achievements

Molecule-based magnets have variety in the material design and then exhibit various non-trivial phenomena. Since they are sensitive to physical pressure, we can study their magnetic properties systematically.
Inelastic neutron scattering (INS) is a powerful tool to study the magnetic properties. However, there are few reports of INS studies on molecule-base materials because of the difficulty to apply it on the molecule-based materials due to some reasons such as contained protons.
In this study, I have prepared high-pressure environment for the INS experiments, and developed a compact radial collimator to extract weak signals from a molecule-based magnet in the pressure cell by eliminating background from the cell. Furthermore, I observed phonon vibration modes of a molecule-based magnet reflecting the crystal structure under pressure. This study will suggest a possibility of the INS measurement for studies of magnetism in molecule-based materials.

Academic Significance and Societal Importance of the Research Achievements

分子磁性体は、新しいデバイスとしての応用を見据えた基礎的な磁性研究が盛んに行われている物質群である。物質の磁性研究において最も強力な実験手法の一つが中性子非弾性散乱であるが、分子性の物質特有のいくつかの困難により、中性子散乱実験がほとんど行われていなかった。
本研究では、中性子非弾性散乱実験を行うためのチョッパー分光器における分子性物質の圧力下測定のデータを改善することに成功した。これにより、分子磁性体の中性子散乱による研究が推進されるようになれば、磁気的性質の解明が進み、ひいては将来の新規デバイス開発に繋がることも期待される。

Research Products

• [Journal Article] Recent Update of AMATERAS: A Cold-Neutron Disk-Chopper Spectrometer (2021)
  • Author(s): Nakajima Kenji、Ohira-Kawamura Seiko、Kofu Maiko、Murai Naoki、Inamura Yasuhiro、Kikuchi Tatsuya、Wakai Daisuke
  • Journal Title: JPS Conf. Proc. Volume: 3
  • DOI: 10.7566/jpscp.33.011089
  • Peer Reviewed / Open Access
• [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] q=0 long-range magnetic order in centennialite CaCu3(OD)6Cl2・0.6D2O: A spin-1/2 perfect kagome antiferromagnet with J1-J2-Jd; (2020)
  • Author(s): K. Iida, H. K. Yoshida, A. Nakao, H. O. Jeschke, Y. Iqbal, K. Nakajima, S. Ohira-Kawamura, K. Munakata, Y. Inamura, N. Murai, M. Ishikado, R. Kumai, T. Okada, M. Oda, K. Kakurai, and M. Matsuda
  • Journal Title: Phys. Rev. B Volume: 101 Issue: 22 Pages: 220408-220408
  • DOI: 10.1103/physrevb.101.220408
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Colossal barocaloric effects in plastic crystals (2019)
  • Author(s): Li Bing、Kawakita Yukinobu、Ohira-Kawamura Seiko、Sugahara Takeshi、Wang Hui、Wang Jingfan、Chen Yanna、Kawaguchi Saori I.、Kawaguchi Shogo、Ohara Koji、他13名
  • Journal Title: Nature Volume: 567 Issue: 7749 Pages: 506-510
  • DOI: 10.1038/s41586-019-1042-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Status of neutron spectrometers at J-PARC (2019)
  • Author(s): Ryoichi Kajimoto, Tetsuya Yokoo, Mitsutaka Nakamura, Yukinobu Kawakita, Masato Matsuura, Hitoshi Endo, Hideki Seto, Shinichi Itoh, Kenji Nakajima, Seiko Ohira-Kawamura
  • Journal Title: Physica B Volume: 562 Pages: 148-152
  • DOI: 10.1016/j.physb.2018.11.061
  • NAID: 120007153036
  • Peer Reviewed / Open Access
• [Journal Article] Cryogenic sample environments shared at the MLF, J-PARC (2019)
  • Author(s): S. Ohira-Kawamura, R. Takahashi, M. Ishikado, Y. Yamauchi, M. Nakamura, K. Ohuchi, H. Kira, W. Kambara, K. Aoyama, Y. Sakaguchi, M. Watanabe and T. Oku
  • Journal Title: J. Neutron Research Volume: 21 Issue: 1-2 Pages: 17-22
  • DOI: 10.3233/jnr-190106
  • Peer Reviewed
• [Journal Article] Background issues encountered by cold-neutron chopper spectrometer AMATERAS (2019)
  • Author(s): T. Kikuchi, K. Nakajima, S. Ohira-Kawamura, Y. Inamura, M. Nakamura, D. Wakai, K. Aoyama, T. Iwahashi and W. Kambara
  • Journal Title: Physica B Volume: 564 Pages: 45-53
  • DOI: 10.1016/j.physb.2019.02.015
  • Peer Reviewed / Open Access
• [Journal Article] Spin correlations of quantum spin liquid and quadrupole-ordered state of Tb2+xTi2-xO7+y (2019)
  • Author(s): H. Kadowaki, M. Wakita, B. Fak, J. Ollivier, S. Ohira-Kawamura, K. Nakajima and J. W. Lynn
  • Journal Title: Phys. Rev. B Volume: 99 Issue: 1
  • DOI: 10.1103/physrevb.99.014406
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Recent issues encountered by AMATERAS: a cold neutron disk chopper spectrometer (2018)
  • Author(s): K. Nakajima, S. Ohira-Kawamura, T. Kikuchi, M. Kofu, Y. Kawakita, Y. Inamura, W. Kambara, K. Aoyama, D. Wakai, M. Harada and M. Ooi
  • Journal Title: J. Phys. Conf. Ser. Volume: 1021 Pages: 012031-012031
  • DOI: 10.1088/1742-6596/1021/1/012031
  • Peer Reviewed / Open Access
• [Journal Article] Quantum paramagnet near spin-state transition (2018)
  • Author(s): K. Tomiyasu, N. Ito, R. Okazaki, Y. Takahashi, M. Onodera, K. Iwasa, T. Nojima, T. Aoyama, K. Ohgushi, Y. Ishikawa, T. Kamiyama, S. Ohira-Kawamura, M. Kofu and S. Ishihara
  • Journal Title: Advanced Quantum Technology Volume: 2018 Issue: 3 Pages: 1800057-1800057
  • DOI: 10.1002/qute.201800057
  • Peer Reviewed / Open Access
• [Journal Article] Continuum excitation and pseudospin wave in quantum spin-liquid and quadrupole ordered states of Tb2+xTi2-xO7+y (2018)
  • Author(s): H. Kadowaki, M. Wakita, B. Fak, J. Ollivier, S. Ohira-Kawamura, K. Nakajima, H. Takatsu and M. Tamai
  • Journal Title: J. Phys. Soc. Jpn Volume: 87 Issue: 6 Pages: 0647041-6
  • DOI: 10.7566/jpsj.87.064704
  • Peer Reviewed
• [Journal Article] Magnetic properties of one-dimensional quantum spin system Rb2Cu2Mo3O12 studied by muon spin relaxation (2018)
  • Author(s): S. Ohira-Kawamura, K. Tomiyasu, A. Koda, D. P. Sari, R. Asih, S. Yoon, I. Watanabe and K. Nakajima
  • Journal Title: JPS Conf. Proc. Volume: 21 Pages: 11007-11007
  • DOI: 10.7566/jpscp.21.011007
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Structure of the magnetic excitations in the spin-1/2 triangular-lattice Heisenberg antiferromagnet Ba3CoSb2O9 (2017)
  • Author(s): Ito Saya、Kurita Nobuyuki、Tanaka Hidekazu、Ohira-Kawamura Seiko、Nakajima Kenji、Itoh Shinichi、Kuwahara Keitaro、Kakurai Kazuhisa
  • Journal Title: Nature Communications Volume: 8 Issue: 1
  • DOI: 10.1038/s41467-017-00316-x
  • Peer Reviewed / Open Access
• [Journal Article] Sample Environment at the J-PARC MLF (2017)
  • Author(s): S. Ohira-Kawamura, T. Oku, M. Watanabe, R. Takahashi, K. Munakata, S. Takata, Y. Sakaguchi, M. Ishikado, K. Ohuchi, T. Hattori, H. Kira, K. Sakai, T. Aso, Y. Yamauchi and S. Isomae
  • Journal Title: J. Neutron Research Volume: 19 Issue: 1-2 Pages: 15-22
  • DOI: 10.3233/jnr-170046
  • Peer Reviewed
• [Journal Article] Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3 (2017)
  • Author(s): B. Li, Y. Kawakita, Y. Liu, M. Wang, M. Matsuura, K. Shibata, S. Ohira-Kawamura, T. Yamada, S. Lin, K. Nakajima and S. Liu
  • Journal Title: Nature Communications Volume: 8 Issue: 1
  • DOI: 10.1038/ncomms16086
  • Peer Reviewed / Open Access
• [Journal Article] Interaction of spin-orbital-lattice degrees of freedom - vibrionic state of corner-sharing-tetrahedral spin frustrated system HoBaFe4O7 by dynamical Jahn-Teller Effect - (2017)
  • Author(s): K. Kamazawa, M. Ishikado, S. Ohira-Kawamura, Y. Kawakita, K. Kakurai, K. Nakajima and M. Sato
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 10
  • DOI: 10.1103/physrevb.95.104413
  • Peer Reviewed
• [Presentation] 冷中性子ディスクチョッパー型分光器AMATERASの2020年 (2020)
  • Author(s): 河村 聖子、古府 麻衣子、中島 健次、村井 直樹、稲村 泰弘、若井 大介
  • Organizer: 日本中性子科学会第20回年会
• [Presentation] Introduction of cold-neutron disk chopper spectrometer AMATERAS and recent results (2019)
  • Author(s): S. Ohira-Kawamura
  • Organizer: Workshop on Neutron and X-ray Characterizations on Caloric Materials (NXCalorics-2019)
  • Int'l Joint Research / Invited
• [Presentation] μSR法でみたEt2Me2Sb[Pd(dmit)2]2の中間非整合相のスピンダイナミクス (2019)
  • Author(s): 河村聖子、Laurent Guerin、渡邊功雄、加藤礼三
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] Magnetic properties of intermediate incommensurate phase in Et2Me2Sb[Pd(dmit)2]2 studied by μSR (2019)
  • Author(s): S. Ohira-Kawamura, L. Guerin, I. Watanabe and R. Kato
  • Organizer: 13th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2019)
  • Int'l Joint Research
• [Presentation] MLFにおける試料環境の現状 (2018)
  • Author(s): 河村聖子、奥隆之、渡辺真朗、坂口佳史、高橋竜太、有馬寛、高田慎一、石角元志、大内啓一、山内康弘、中村雅俊
  • Organizer: User Group Meeting on MLF Spectrometers（DIRECTION 2018）
• [Presentation] クランプセルを用いた圧力下非弾性散乱測定の手法開発 (2018)
  • Author(s): 河村聖子、服部高典、佐野亜沙美、有馬寛、町田真一、石角元志、宗像孝司、菊地龍弥、古府麻衣子、中島健次
  • Organizer: User Group Meeting on MLF Spectrometers（DIRECTION 2018）
• [Presentation] Status of cryogenics and magnets at J-PARC MLF (2018)
  • Author(s): S. Ohira-Kawamura, R. Takahashi, S. Ohira-Kawamura, M. Ishikado, K. Ohuchi, Y. Yamauchi, M. Nakamura, H. Kira, W. Kambara, K. Aoyama, M. Watanabe and T. Oku
  • Organizer: 10th International Workshop on Sample Environment at Scattering Facilities
  • Int'l Joint Research
• [Presentation] Magnetic ground state and dynamics in one-dimensional quantum spin system Rb2Cu2Mo3O12 studied by μSR (2018)
  • Author(s): S. Ohira-Kawamura, K. Tomiyasu, A. Koda, D. P. Sari, R. Asih, S. Yoon, I. Watanabe, and K. Nakajima
  • Organizer: 3rd International Symposium of Quantum Beam Science at Ibaraki University
  • Int'l Joint Research / Invited
• [Presentation] クランプセルを用いた圧力下の低エネルギー中性子非弾性散乱の手法開発 (2018)
  • Author(s): 河村聖子、服部高典、佐野亜沙美、菊地龍弥、古府麻衣子、中島健次、宗像孝司
  • Organizer: 2017年度量子ビームサイエンスフェスタ
• [Presentation] Phonon modes of β'-(BEDT-TTF)2ICl2 coupled with charge and spin studied by inelastic neutron scattering (2017)
  • Author(s): S. Ohira-Kawamura, M. Matsuura, S. Iguchi, T. Sasaki, H. Taniguchi, A. Kubota, K. Satoh, Y. Inamura, T. Kikuchi and K. Nakajima
  • Organizer: 12th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2017)
  • Int'l Joint Research
• [Presentation] Studies on phonon modes in a molecular dimer-Mott insulator β'-(BEDT-TTF)2ICl2 by inelastic neutron scattering (2017)
  • Author(s): S. Ohira-Kawamura, M. Matsuura, S. Iguchi, T. Sasaki, H. Taniguchi, A. Kubota, K. Satoh, Y. Inamura, T. Kikuchi and K. Nakajima
  • Organizer: International Conference on Neutron Scattering (ICNS2017)
  • Int'l Joint Research
• [Presentation] Magnetic properties of one-dimensional quantum spin system Rb2Cu2Mo3O12 studied by mSR (2017)
  • Author(s): S. Ohira-Kawamura, K. Tomiyasu, A. Koda, Dita P. Sari, R. Asih, S. Yoon, I. Watanabe, K. Nakajima
  • Organizer: 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (mSR2017)
  • Int'l Joint Research