Neutron scattering spectroscopic study on superconducting-antiferromagnetic phase diagram and pseudo-gap state

中子散射和大晶体生长技术相结合，获得了新的和重要的结果之间的关系的磁性和导电性的金属磁体，包括超导体。（1）用中子散射和X射线散射研究了铜氧化物超导体的磁-超导相图。因此，我们成功地区分共同的和材料依赖的功能的相图，这提供了关键的信息向更高的超导转变temperature.We提出了一个简单的模型来定性地描述独特的和共同的磁激励的金属磁体，不能理解的传统的自旋波模型。（2）在日本首次成功地获得了高质量的Cu_2 Mn_Al大单晶，并成功地制作了垂直聚焦中子极化器。

Combination of neutron scattering and large crystal-growth techniques obtained new and important results on the relation between magnetism and electric conductivity for metallic magnets including superconductors.(1)The magnetic-superconducting phase diagram was comprehensively studied for cuprate superconductors by neutron scattering and X-ray scattering. As a result, we succeeded in discriminating common and material-dependent features of the phase diagram, which provide key information towards higher superconducting transition temperature.We proposed a simple model to describe qualitatively the unique and common magnetic excitation of metallic magnets which cannot be understood by a conventional spin-wave model.(2)High quality large single crystal of Cu2MnAl was reproducibly obtained and vertically focused neutron polarizer was constructed for the first time in Japan.