Magnetism and Magneto-Optics of Artificially -Structured Materials

这项工作旨在加深我们对一类新型人工结构的磁性层状材料的理解，这种材料由非晶和晶体成分组成。这项工作的主要重点将是：(a)基本微观相互作用（各向异性和交换）与磁性和自旋相关性之间的关系，(b)电子结构、光学和磁光特性之间的关系，以及(c)具有所需特性的磁性材料的设计研究。将进行的实验类型包括x射线衍射、电子显微镜、直流磁化、交流磁化率、穆斯堡尔效应、椭偏、极性克尔效应和小角中子散射（在NIST）。除了提供关于制备不同类型的双层和多层磁性薄膜的过程的信息外，该研究还应增加我们对以下方面的认识：(a)界面磁性和垂直各向异性，(b)基于化学考虑的电子结构和合金设计原则之间的基本关系，以及(c)基于这些系统的新型磁光数据存储介质的前景。

The proposed work is intended to deepen our understanding of a novel class artificially-structured, magnetic layered materials, composed of both amorphous and crystalline components. The main thrusts of the work will be: (a) relationships between fundamental microscopic interactions (anisotropy and exchange) and the magnetic properties and spin correlations, (b) relationships between electronic structure, optical, and magneto- optical properties, and (c) studies of the design of magnetic materials with the desired properties. The types of experiments to be performed include x-ray diffraction, electron microscopy, dc magnetization, ac susceptibility, Mossbauer effect, ellipsometry, polar Kerr effect, and small angle neutron scattering (at NIST). In addition to providing information on procedures for producing different types of bilayered and multi- layered magnetic films the research should increase our understanding of: (a) interfacial magnetism and perpendicular anisotropy, (b) fundamental relationships between electronic structure and principles of alloy design based on chemical considerations, and (c) prospects for new magnetic-optic data storage media based on these systems.