Studies of Artificially Structured Materials

人工结构材料的研究

• 批准号: 9501195
• 负责人: Chia-Ling Chien
• 金额: $ 30万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-15 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9501195&HistoricalAwards=false
• 关键词: Studies; Artificially; Structured; Materials

9501195 Chien A variety of artificially structured materials composed of multilayers and granular solids will be fabricated by multi-source sputter deposition and pulsed laser deposition, and characterized by x-ray diffraction, transmission electron microscopy, and other techniques. The superconducting/magnetic multilayers are designed to reveal newly found phenomena and proximity effects. The giant magneto-transport properties of granular and multilayer systems will be studied to capture the intricate physics. A variety of unconventional magnetic multilayers are intended to probe interlayer coupling, the role of amorphous constituent layers, and the behavior of metal-insulator systems. These are problems of current interest, many of them also have technological importance in high-density magnetic storage and magnetoresistive read-out devices. %%% This proposal focuses on a variety of artificially structured materials composed of multilayers and granular solids, where the layer thickness or the particle diameter is only about 100 billionths of an inch. These new materials, fabricated by advanced processing methods, exhibit a host of new and novel properties that are unavailable in ordinary materials. Of particular interest are the superconducting properties, the giant magnetoresistance behavior, and the coupling between magnetic layers. These properties have relevance in applications of superconductors in magnetic fields, high density magnetic storage, and magnetoresistive read-out technology. ***

9501195 Chien 将通过多源溅射沉积和脉冲激光沉积来制造由多层和粒状固体组成的各种人工结构材料，并通过 X 射线衍射、透射电子显微镜和其他技术进行表征。 超导/磁性多层旨在揭示新发现的现象和邻近效应。 将研究颗粒和多层系统的巨磁输运特性，以捕捉复杂的物理现象。 各种非常规磁性多层旨在探测层间耦合、非晶成分层的作用以及金属绝缘体系统的行为。 这些都是当前人们感兴趣的问题，其中许多问题在高密度磁存储和磁阻读出设备中也具有技术重要性。 %%% 该提案重点关注由多层和粒状固体组成的各种人工结构材料，其中层厚度或颗粒直径仅为约十亿分之一英寸。 这些通过先进加工方法制造的新材料表现出许多普通材料所不具备的新特性。 特别令人感兴趣的是超导特性、巨磁阻行为以及磁性层之间的耦合。 这些特性与超导体在磁场、高密度磁存储和磁阻读出技术中的应用相关。 ***