Abstract
This chapter focuses on multilayered retained austenite/martensite steels and multilayered Co/Pt films for high density magnetic recording. The development of high-tech materials requires functional, multi-component microstructures including multilayers, designed, processed, and controlled at the micron and nanometer levels. It is now quite well recognized that to optimize and design materials for specified properties, materials are best utilized as composites. The nature of the components, their structures, morphologies, and interfacial characteristics are most important. In particular, multilayered nano-structures are attractive for mechanical and many functional properties. In order to understand the properties of any such multilayered system and to be able to design pre-determined sets of properties, it is necessary to know their structure. For this reason, characterization of physical, chemical, and magnetic structures at relevant length scales is of particular importance. Materials Science and engineering is concerned with understanding the relationships between processing, microstructure, and properties. With this understanding it is now possible to manipulate the microstructure down to the nano size, so as to achieve a set of defined properties.
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