GOALI: Spin Transfer in Magnetic Nanostructures

GOALI：磁性纳米结构中的自旋转移

• 批准号: 0706322
• 负责人: Andrew Kent
• 金额: $ 34.5万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0706322&HistoricalAwards=false
• 关键词: GOALI; Spin; Transfer; Magnetic; Nanostructures

Technical:This NSF-GOALI project brings together researchers in nanomagnetism from NYU and IBM with the aim of furthering the understanding of the physics of spin-transfer and applications of spin-transfer to high performance devices, such as magnetic random access memory (MRAM). Spin-transfer is a mechanism by which a spin-polarized current can alter the magnetic orientation of a nanomagnet and induce magnetic excitations such as spin-waves. This is an exciting development that will very likely enable dramatic improvements in magnetic information processing and storage. This is because spin-transfer offers a mechanism for rapidly reversing the magnetization of nanomagnets with large magnetic anisotropy that would otherwise require huge local magnetic fields an achievement critical to increasing magnetic information storage density. Further advancement of this field requires a quantitative understanding of spin-transfer induced dynamics and its dependence on materials properties. This knowledge will guide technological developments that will enable a reduced switching current and increased switching speed of spin-transfer MRAM. The present project will take significant steps in this direction through the investigation of new device structures and materials, using unique broad-band high-frequency measurement techniques at NYU as a tool both for the characterization of materials parameters and for assessing device performance. Graduate and undergraduate students involved in this collaboration will gain by interactions between academia and industry and through the many planned student exchanges between NYU and IBM. High school students (with interests in Intel Science Research) will also participate in this research.Non-Technical:This project brings together researchers from NYU and IBM with the aim of furthering the understanding and application of nanometer scale magnetic devices and materials. Magnetic nanostructures are widely used in technology with the most advanced applications found in information processing. This is a huge industry in the United States that is growing rapidly, with the ever-increasing worldwide demands for data processing and storage. It has recently been discovered that in miniature magnetic devices a direct electrical current can switch the direction of magnetization by a mechanism known as spin-transfer. This is an exciting development that may enable dramatic improvements in magnetic information processing and storage. There are many important and fundamental questions about the nature of the interaction between the current and magnetization that this project will address through the investigation of new device structures, materials and unique high frequency measurement techniques available at NYU. This research will be integrated with the training of young scientists in this forefront area of magnetism research. Graduate and undergraduate students involved in this collaboration will gain by interactions between academia and industry and through the many planned exchanges between NYU and IBM. Their education will be enriched through exposure to a variety of perspectives, expertise and techniques present in an industrial setting. High school students (with interests in Intel Science Research) will also participate in this research.

技术：这个NSF-GOALI项目汇集了来自纽约大学和IBM的纳米磁学研究人员，旨在进一步了解自旋转移的物理学和自旋转移在高性能设备（如磁性随机存取存储器（MRAM））中的应用。自旋转移是一种机制，通过该机制，自旋极化电流可以改变纳米磁体的磁取向并诱导磁激发，例如自旋波。这是一个令人兴奋的发展，很可能使磁信息处理和存储的显着改善。这是因为自旋转移提供了一种机制，用于快速反转具有大磁各向异性的纳米磁体的磁化，否则需要巨大的局部磁场，这对于增加磁信息存储密度至关重要。这一领域的进一步发展需要定量的了解自旋转移诱导的动力学及其对材料性能的依赖性。这些知识将指导技术发展，使自旋转移MRAM的开关电流降低，开关速度提高。本项目将通过研究新的器件结构和材料，在纽约大学使用独特的宽带高频测量技术作为表征材料参数和评估器件性能的工具，在这一方向上迈出重要的一步。 参与这项合作的研究生和本科生将通过学术界和工业界之间的互动以及纽约大学和IBM之间的许多计划中的学生交流而获益。高中生（对英特尔科学研究感兴趣）也将参与这项研究。非技术性：该项目汇集了来自纽约大学和IBM的研究人员，旨在进一步理解和应用纳米尺度的磁性器件和材料。磁性纳米结构被广泛应用于信息处理中最先进的应用技术。这是美国的一个巨大行业，随着全球对数据处理和存储的需求不断增长，该行业正在迅速发展。最近发现，在微型磁性器件中，直流电可以通过称为自旋转移的机制来切换磁化方向。这是一个令人兴奋的发展，可能使磁信息处理和存储的显着改善。关于电流和磁化之间相互作用的性质，有许多重要和基本的问题，该项目将通过对纽约大学提供的新器件结构，材料和独特的高频测量技术的研究来解决。这项研究将与磁学研究这一前沿领域的年轻科学家的培训相结合。参与这项合作的研究生和本科生将通过学术界和工业界之间的互动以及纽约大学和IBM之间的许多计划中的交流而获益。他们的教育将通过接触各种观点，专业知识和技术在工业环境中得到丰富。高中生（对英特尔科学研究感兴趣）也将参与这项研究。