SFB 463: Rare-Earth Transition-Metal Compounds: Structure,Magnetismus and Transport

463合作研究中心的范围是研究稀土过渡金属化合物的电子特性及其与晶体结构的关系。作为硬磁体，这些化合物中的一些与磁存储器件的应用有关，一些化合物是超导体，其他化合物显示出奇异的电子相关现象，如价不稳定性和重费米子行为，可能对磁电子器件的应用有用。目前研究项目的目的是在详细了解底层物理机制的基础上开发具有优化材料性能的新材料。由于这些金属间体系揭示了丰富且大部分未知的相图，因此建立了一个联合材料制备中心，致力于相图的研究和单相多晶和单晶样品的制备。这些样品通过不同的实验技术进行研究，如电子能谱、中子散射、磁化、热容和电导率测量。对数据的理解至关重要的是实验学家和理论家之间的密切合作，这是通过合作研究中心的几个理论小组的参与来实现的。

Scope of the collaborative research centre 463 are investigations of the electronic properties of rare-earth transition-metal compounds and their relationship to crystallographic structure. As hard magnets several of these compounds are relevant for applications in magnetic storage devices, some compounds are superconductors, and others reveal exotic electron correlation phenomena like valence instabilities and heavy Fermion behavior that might be usefull for applications in magneto-electronic devices. Aim of the present research project is the development of new materials with optimized material properties based on a detailed understanding of the underlaying physical mechanisms. Since these intermetallic systems reveal rich and largely unknown phase diagrams a joint material preparation center has been founded that is dedicated to the investigation of the phase diagrams and the preparation of single-phased polycristalline and single-cristalline samples. These samples are studied by means of different experimental techniques like e.g. electron spectroscopies, neutron scattering, and magnetization, heat-capacity and conductivity measurements. Crucial for the understanding of the data is finally a close collaboration between experimentalists and theoreticians that is realized by the participation of several theory groups in the collaborative research centre.