Research of Solid State Physics in Ultra High Magnetic Fields

该项目的目的是在日本从事高场科学的人员的合作下发现新现象并开发新材料。本课题的主要研究成果如下：1）4f-5 f电子系统：对重费米子系统CeRu 2Si 2中观察到的变磁跃迁的理解，对CeB 6或Ce 3 Pd 20 Ge 6.2）超晶格中晶格畸变引起的四极有序相的研究，低维晶格材料的电子控制：关于稀磁半导体的新信息，其中塞曼能与差距能和交换能竞争，关于量子威尔斯，由于界面的波动而显示出强烈的光发射，以及关于低维有机导体中的回旋共振的观察。3)有序和无序晶格或自旋系统：观察S=1替代键材料的新型磁化过程，通过三角形晶格磁体的磁共振观察到的新相，以及对自旋Peierls材料CuGeO 3的杂质状态的理解。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。新型无液氦超导磁体技术的发展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.