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Magnetism and Magneto-Optics of Artificially-Structured Materials

人工结构材料的磁学和磁光学

基本信息

批准号：
9222976
负责人：
David Sellmyer
金额：
$ 21万
依托单位：
University of Nebraska-Lincoln
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-06-01 至 1996-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9222976&HistoricalAwards=false
关键词：
Magnetism Magneto Optics Artificially Structured

项目摘要

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.

本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、纳米晶复合材料的薄膜和纳米级团簇，以及具有各向异性结构的锰基化合物和薄膜。本研究将聚焦于1)磁化反转、畴动力学和薄膜纳米结构之间的关系，以及2)合成的新型相的基本磁光性质，以产生显著的磁光效应。将进行一系列的磁化测量。此外，椭偏光谱将被用来全面表征材料的介电张量特性。在选定的情况下，光电测量将用于研究新化合物的电子结构。这些测量将增加对几种新型过渡金属化合物的电子结构和磁光学之间基本关系的理解。磁性薄膜和颗粒磁性材料正在被合成和研究，以确定它们的磁光特性——这是决定它们作为磁性存储介质效用的关键。研究的目的是制备具有增强性能和潜力的新材料，用于光学存储磁盘，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光谱学和光谱学技术进行研究。