Magnetism and Magneto-Optics of Artificially-Structured Materials

该项目涉及新型磁光活性材料的研究。这些结构包括人工结构的磁性多层膜、薄膜和纳米级纳米晶复合材料簇，以及具有各向异性结构的锰基化合物和薄膜。这项工作将集中在1)磁化反转、磁畴动力学和薄膜纳米结构之间的关系，以及2)合成的新相的基本磁光性质以产生显著的磁光效应。将进行一系列磁化测量。此外，椭圆偏振光谱将被用来充分表征材料的介电张量特性。在选定的情况下，将使用光电子能谱测量来研究新化合物的电子结构。这些测量将增加对几类新的过渡金属化合物中电子结构和磁光之间的基本关系的理解。%磁性薄膜和颗粒磁性材料正在被合成和研究，以确定它们的磁光性能--这对确定它们作为磁存储介质的用途至关重要。该研究的目的是制备具有增强的性能和潜力的新材料，用于光存储盘、计算机硬盘和其他形式的磁存储设备。材料的基本性质将通过磁谱和光谱学技术进行研究。

This project involves studies of novel magneto-optically active materials. The structures include artificially structured magnetic multilayers, thin films and nanoscale clusters of nanocrystalline composites, and manganese-based compounds and films with anisotropic structures. The work will focus on 1) the relationships between magnetization reversal, domain dynamics, and nanostructures of the films, and 2) fundamental magneto-optical properties of novel phases synthesized to produce significant magneto-optic effects. A range of magnetization measurements will be performed. In addition, spectroscopic ellipsometry will be used to fully characterize the dielectric tensor properties of the materials. In selected cases, photoemission measurements will be used to study the electronic structure of the new compounds. The measurements will increase the understanding of fundamental relationships between electronic structure and magneto-optics in several new classes of transition metal compounds. %%% Magnetic thin films and particulate magnetic materials are being synthesized and studied to determine their megneto-optic properties -- which are critical in determining their utility as magnetic storage media. The objective of the research is to prepare new materials with enhanced properties and potential for use in optical storage discs, computer hard discs, and other form of magnetic storage device. The fundamental properties of the materials will be investigated by magnetic and optical spectroscopy techniques.