Research of Solid State Physics in Ultra High Magnetic Fields

该项目的目的是在日本从事高领域科学工作的人们的合作下，发现新现象和开发新材料。本项目开始时提出的课题，已获得的结果如下：1) 4f-5f电子体系：了解重费米子体系之一CeRu2Si2中观测到的超磁跃迁，CeB6或Ce3Pd20Ge6.2超晶格中晶格畸变引起的四极有序相研究，低维晶格材料的电子控制；在塞曼能与间隙能和交换能竞争的稀磁半导体中，在由于界面波动而表现出强光发射的量子阱中，以及在低维有机导体中回旋共振的观察中，获得了新的信息。3)有序和无序晶格或自旋体系：S=1替代键材料新型磁化过程的观察，三角晶格磁体上磁共振观察到的新相，自旋Peierls材料CuGeO3杂质态的认识。此外，在强磁场下的材料加工和光化学反应方面也取得了新的成果。不使用液氦的新型超导磁体的技术开发将有助于高场科学的发展。

The purpose of this project is to aim to discovery of new phenomena and development of new materials under collaborations by people who are working on high field science in Japan. The obtained results for the subjects which were proposed at the beginning of this project are as follows ; 1) 4f-5f electron systems : the understanding of metamagnetic transition observed in one of the heavy fermion system, CeRu2Si2, and research on quadrapole order phases caused by lattice distortions in CeB6 or Ce3Pd20Ge6.2) superlattice, electron control of low dimensional lattice materials : new information on diluted magnetic semiconductors in which Zeeman energy competes with the gap energy and exchange energy, on quantum wells which show strong light emission due to fluctuation of interfaces and on observation of cyclotron resonance in low dimensional organic conductors. 3) order-and disorder-lattice or spin systems : observation of new type of magnetization process on S=1 alternative bond materials, new phases observed by magnetic resonance on triangular lattice magnets and understanding of impurity state of spin Peierls material, CuGeO3. In addition, new results were obtained in material processing and optchemical reaction under high magnetic field. Technical development of new type superconducting magnet which uses no liquid Helium will contribute to high field science.