Research on Magnetism and Superconductivity of Rare Earth and Actinide Compounds

稀土和锕系化合物的磁性和超导性质的研究是最有趣的课题。在这一领域，近10年来取得了显著的进步，仍有令人兴奋的发现和理论发展在不断进行。另一方面，丰硕的成果是对现代技术应用的热切期待。在稀土和锕系化合物中，磁性和超导电性之间存在着相互作用。在该体系中，磁性和超导性表现出与实验条件相对应的许多方面，因此本研究需要相互补充的研究技术。格勒诺布尔是欧洲共同体的研究中心，有2万人从事基础研究工作。通过与J. Flouquet博士和他的团队的合作，除了我们日本方面的实验，如SQUID磁化，核磁共振，比热测量和超高脉冲磁场下的实验外，我们还可以进行50mK以下的中子散射和热容量实验。我们国际合作的目的是研究磁性和超导性的相互作用以及四极和交换相互作用共存体系中的磁性。

Research on magnetic and superconducting properties of rare earth and actinide compounds is the most interesting subject. In this field, there was remarkable progress for last 10 years and still exciting discoveries and theoretical development are continuously in progress.On the other hand, the fruitful results are in enthusiastic anticipation for the application to modern technology.In the new exotic superconductivity in rare earth and actinide compounds, there is an interplay between magnetism and superconductivity.In this system, the magnetic and superconducting properties show many aspects corresponding to experimental condition, For this study, mutually supplementary research techniques are required.Grenoble is the research center of European community where 20, 000 people are engaged in fundamental research work. By the collaboration with Dr. J. Flouquet and his group, we have a merit to perform neutron scattering and heat capacity experiments down to 50mK in addition to the experiments of our Japanese side, as SQUID magnetization, NMR, specific heat measurement and the experiment under and ultra-high pulse magnetic field.The purpose of our international collaboration is concerned with the research on the interplay between magnetism and superconductivity and the magnetic properties in the coexisting system of quadrupolar and exchange interactions.