High Anisotropy Magnetic Nanoparticles and Nanocomposites

高各向异性磁性纳米颗粒和纳米复合材料

• 批准号: 0203913
• 负责人: George Hadjipanayis
• 金额: $ 5万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0203913&HistoricalAwards=false
• 关键词: Anisotropy; Magnetic; Nanoparticles; Nanocomposites

This material synthesis and processing project is focused on next generation magnetic materials. Of primary importance is the preparation and characterization of high anisotropy CoPt and FePt nanoparticles. The particles will be prepared by a "cluster gun" assembly equipped with a special heat-treating stage, required to transform their structure from the fcc phase to the high anisotropy fct phase. Specially prepared substrates will also be used to assemble these nanoscale particles into ordered arrays. The properties of the particles and their arrays will be investigated as candidate media for high-density magnetic recording. The project will provide one post-doctoral associate with cutting edge training and education in magnetism and materials science. The project is co-funded between the Metals Program and the Condensed Matter Physics Program.This material synthesis and processing project is focused on next generation magnetic materials. As a magnetic particle is continually reduced in size to the nanometer regime, it becomes susceptible to temperature effects that can cause its magnetization to fluctuate in different directions. It is no longer possible to "store" information in the particle's magnetization orientation. These issues are among the most important limits to how dense information can be stored on hard disk drives. The objective of this research is to develop recording media that will function at room temperature while using particles of sizes below one millionth of an inch. The materials are alloys or compounds of cobalt, platinum and iron. The project will provide one post-doctoral associate with cutting edge training and education in magnetism and materials science. The project is co-funded between the Metals Program and the Condensed Matter Physics Program.

该材料合成和加工项目专注于下一代磁性材料。 最重要的是高各向异性 CoPt 和 FePt 纳米颗粒的制备和表征。 这些颗粒将通过配备特殊热处理阶段的“簇枪”组件来制备，需要将其结构从 fcc 相转变为高各向异性 fct 相。 专门准备的基底也将用于将这些纳米级颗粒组装成有序阵列。 粒子及其阵列的特性将作为高密度磁记录的候选介质进行研究。 该项目将为一名博士后提供磁性和材料科学领域的前沿培训和教育。 该项目由金属项目和凝聚态物理项目共同资助。该材料合成和加工项目专注于下一代磁性材料。 随着磁性颗粒的尺寸不断减小到纳米范围，它变得容易受到温度影响，从而导致其磁化强度在不同方向上波动。 不再可能在粒子的磁化方向上“存储”信息。 这些问题是硬盘驱动器上存储信息密度的最重要限制之一。 这项研究的目的是开发能够在室温下使用尺寸低于百万分之一英寸的颗粒的记录介质。 材料为钴、铂、铁的合金或化合物。 该项目将为一名博士后提供磁性和材料科学领域的前沿培训和教育。 该项目由金属计划和凝聚态物理计划共同资助。