Magnetism and Magneto-Optics of Artificially-Structured Materials

该项目涉及新型磁光活性 材料. 这些结构包括人工结构的磁性材料， 纳米晶的多层膜、薄膜和纳米级团簇 复合材料，以及锰基化合物和薄膜， 各向异性结构 工作重点：1） 磁化反转、磁畴动态和 薄膜的纳米结构，以及2）基本磁光 合成的新相的性质， 磁光效应 一系列的磁化测量将 被执行。 此外，还将使用光谱椭圆偏振法 为了充分表征的介电张量性质的 材料. 在选定的情况下，光电发射测量将 用于研究新化合物的电子结构。 的 测量将增加对基本原理的理解 电子结构与磁光的关系 几类新的过渡金属化合物。 %%% 磁性薄膜和颗粒磁性材料正在被 合成并研究了它们的磁光特性 --这是决定它们作为磁性材料的实用性的关键 存储介质。 研究的目的是准备新的 具有增强性能和在光学中使用潜力的材料 存储盘、计算机硬盘和其它形式磁性介质 存储设备。 材料的基本性质将 通过磁和光学光谱技术进行研究。

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.