RUI: Nonlinear Effects in Strongly Driven Magnetic Structures

RUI：强驱动磁结构中的非线性效应

• 批准号: 0907053
• 负责人: Zbigniew Celinski
• 金额: $ 30万
• 依托单位: University of Colorado at Colorado Springs
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907053&HistoricalAwards=false
• 关键词: RUI; Nonlinear; Effects; Strongly; Driven

Non-technical AbstractThe magnetics group at the University of Colorado at Colorado Springs, a predominantly undergarduate instition, has recently developed a method which creates large magnetic fields which oscillate about 10 billion times per second. This allows the study of many magnetic materials in the so-called "nonlinear limit" where unique and useful behavior can be found. For example, this can be used to amplify weak electromagnetic waves in a material, or to pick out a real signal hidden in noise. The work will have a number of broader impacts. It has important implications in practical problems because of the special signal processing devices that can be made using nonlinear motion. Furthermore, nonlinear effects are important for ultrafast switching of small magnetic elements in magnetic memory systems. In addition, the project will provide education and training for all levels of students - high school students, undergraduates, graduate students and post-doctoral researchers. Finally, the magnetics group in Colorado Springs has an excellent record of involving underrepresented groups in research, starting at the high school level, and this effort will be continued. Technical AbstractThe magnetics group at the University of Colorado at Colorado Springs, a predominantly undergarduate instition, has recently developed a method which creates large oscillating magnetic fields, up to 500 Oe in comparison to the typical 0.1 Oe found in standard ferromagnetic resonance. This allows the study of nonlinear magnetic motion with large precession angles. Three fundamental research topics will be studied: 1) Nonlinear effects in metallic ribbons of Fe and Py, 2) Nonlinear effects in ultra-small elements of Fe and Py, and 3) Spectral analysis of the spin waves involved in nonlinear processes. The experimental effort will be supported by theoretical calculations. This work will have a number of broader impacts. It has important implications in practical problems because, for example, unique signal processing devices such as a signal to noise enhancer can be made using the nonlinear behavior studied here. Furthermore, nonlinear effects are significant for ultrafast switching of small magnetic elements in magnetic memory systems. In addition, this project will provide education and training for all levels of students - high school students, undergraduates, graduate students and post-doctoral researchers. Finally, the magnetics group in Colorado Springs has an excellent record of involving underrepresented groups in research, starting at the high school level, and this effort will be continued.

非技术摘要科罗拉多大学科罗拉多斯普林斯分校的磁学小组是一所以本科为主的机构，最近开发了一种方法，可以产生每秒振荡约 100 亿次的大磁场。这允许在所谓的“非线性极限”中研究许多磁性材料，在其中可以发现独特且有用的行为。例如，这可用于放大材料中的微弱电磁波，或找出隐藏在噪声中的真实信号。这项工作将产生许多更广泛的影响。由于可以使用非线性运动制造特殊的信号处理装置，因此它对实际问题具有重要意义。此外，非线性效应对于磁存储系统中小型磁性元件的超快切换非常重要。此外，该项目还将为各级学生——高中生、本科生、研究生和博士后研究人员提供教育和培训。最后，科罗拉多斯普林斯的磁学小组在让代表性不足的群体参与研究方面有着出色的记录，从高中阶段开始，这一努力将继续下去。技术摘要科罗拉多大学科罗拉多斯普林斯分校的磁学小组（主要是本科机构）最近开发了一种方法，可以产生高达 500 Oe 的大振荡磁场，而标准铁磁共振中的典型振荡磁场为 0.1 Oe。这使得研究具有大进动角的非线性磁运动成为可能。将研究三个基础研究课题：1）Fe和Py金属带中的非线性效应，2）Fe和Py超小元素中的非线性效应，3）非线性过程中涉及的自旋波的谱分析。实验工作将得到理论计算的支持。这项工作将产生许多更广泛的影响。它对实际问题具有重要意义，因为例如可以使用此处研究的非线性行为来制造独特的信号处理设备（例如信噪比增强器）。此外，非线性效应对于磁存储系统中小型磁性元件的超快切换非常重要。此外，该项目还将为各级学生——高中生、本科生、研究生和博士后研究人员提供教育和培训。最后，科罗拉多斯普林斯的磁学小组在让代表性不足的群体参与研究方面有着出色的记录，从高中阶段开始，这一努力将继续下去。