Magnetism and Magneto-Optics of Novel Nanoscaled Materials

w：\awards\awards96\*.doc 9623992 Sellmyer 这 研究 该计划旨在推进 我们对新型纳米材料的磁性和磁光现象的理解。 要研究的结构类型包括 纳米晶和亚稳相化合物 和合金， 和新颖的多层和颗粒纳米复合材料体系。 将特别注意这些材料的薄膜合成的纳米级晶体结构，不存在于散装形式的外延稳定，并通过快速热处理方法。 这个计划的一个重要重点是对粒子间的基本理解 或晶粒间的相互作用，相变 和介电行为、电子结构和磁光性质。 薄膜磁性能的合成和控制在现代科学和社会中起着极其重要的作用。 这方面的一个重要方面是我们在纳米尺度（1纳米约等于4个原子直径）人工构造新材料的能力不断增长，并将这些材料制造成具有仅在十年前难以想象的特性和应用的设备。 信息存储和磁电子器件激发了人们对纳米磁性薄膜的极大兴趣。 近几十年来，计算机硬盘驱动器中的信息密度一直以每10年大约10倍的速率增加，并且最近该速率已经增加。 这一进展取决于对纳米结构磁性材料的理解和控制的重大进展，这是本研究的主题。 ***

w:\awards\awards96\*.doc 9623992 Sellmyer This research program is directed towards advancing our understanding of magnetism and magneto-optic phenomena in novel nanoscaled materials. The types of structures to be studied include nanocrystalline and metastable-phase compounds and alloys, and novel multilayer and particulate nanocomposite systems. Special attention will be paid to the thin-film synthesis of these materials by epitaxial stabilization of nanoscaled crystal structures which do not exist in bulk form, and by rapid thermal-processing methods. A significant emphasis of this program is on fundamental understanding of the inter- particle or inter-grain interactions, phase-transition and coercivity behavior, and electronic structure and magneto-optical properties of these novel materials. %%% The synthesis and control of the magnetic properties of thin films play an extremely important role in modern science and society. A significant aspect of this is our growing ability to artificially structure novel materials at the nanometer scale (1 nanometer equals about four atomic diameters) and to fabricate such materials into devices with properties and applications which were hardly imagined only a decade ago. A large part of the interest in nanoscaled magnetic films is stimulated by information storage and magnetoelectronic devices. In recent decades the information density in computer hard disk drives has been increasing at the rate of about a factor of 10 every 10 years and recently the rate has increased. This progress is dependent on major advances in understanding and control of nanostructured magnetic materials, which is the subject of this research. ***