Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/02

  • 研究者氏名
    Researcher Name

    那波和宏 Kazuhiro NAWA
    准教授 Associate Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門 スピン量子物性研究分野
    Division of Inorganic Material Research, Quantum Spin Physics
  • 研究キーワード
    Research Keywords

    Low-dimensional/Frustrated magnetism
    Neutron scattering
    Material exploration/synthesis
Research Subject
Exploring new magnetic orders and excitations using neutron scattering technique

研究の背景 Background


Materials exhibit various phases depending on their temperature and pressure. For instance, a gas transforms into a liquid and then a solid when it is cooled down. Similarly, magnetic materials exhibit various magnetic phases. What dominates these phases are spin and orbital momentum of electrons. When magnetic materials are cooled down, they transform from “a gaseous phase” with randomly oriented spins, to “a solid phase” where spins are aligned regularly. However, we can even expect that spin liquid or spin nematic phases should be realized due to a wave nature, so called as quantum fluctuations.

研究の目標 Outcome


The target of this research is low-dimensional magnets, where spins are arranged in a one- or two dimensional network, and frustrated magnets, where magnetic interactions compete. We are aiming to prove exotic phases such as spin liquid or spin nematic phases experimentally by exploring new model compounds and performing neutron scattering experiments on them.

研究図Research Figure

Fig.1. 浮遊帯域溶融法により作製し た一次元結合交替鎖 Pb2V3O9 の単結 晶試料[1] Fig.2. 核磁気共鳴法(NMR)による 一次元フラストレート 磁性体 LiCuVO4 におけるスピン液晶状態 の検証[2] Fig.3. 強磁場磁化過程による一次元 フラストレート磁性体 NaCuMoO4(OH)におけるスピン液晶 状態の検証[3]

文献 / Publications

[1] J. Phys. Soc. Jpn. 80, 034710 (2011).
[2] Phys. Rev. B 90, 134401 (2014).
[3] J. Phys. Soc. Jpn. 83, 103702 (2014).