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斯普林斯分校的磁性小组，这是一种主要是不足的工具，最近开发了一种方法，该方法产生了大型磁场，每秒可振荡约100亿次。这允许研究在所谓的“非线性极限”中发现许多磁性材料，在其中可以找到独特而有用的行为。例如，这可用于放大材料中的弱电磁波，或挑选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的特殊信号处理设备，因此它对实际问题具有重要意义。此外，非线性效应对于磁记忆系统中小磁元素的超快切换很重要。此外，该项目将为所有级别的学生提供教育和培训 - 高中生，大学生，研究生和博士后研究人员。最后，科罗拉多斯普林斯（Colorado Springs）的磁性集团（Magnetics Group）在高中级别开始，涉及人数不足的小组参与研究的良好记录，这项工作将继续进行。科罗拉多斯普林斯分校的技术摘要，主要是不足的工具，最近开发了一种方法，该方法与标准的ferermagnetic共振中发现的典型的0.1 OE相比，它创建了高达500 OE的大型振荡磁场。这允许研究具有较大进动角的非线性磁运动。将研究三个基本研究主题：1）FE和PY的金属丝带中的非线性效应，2）Fe和Py的超小元素中的非线性效应，以及3）对非线性过程中旋转波的光谱分析。实验工作将由理论计算支持。这项工作将产生许多更广泛的影响。它在实际问题上具有重要的含义，因为例如，可以使用此处研究的非线性行为来制作唯一的信号处理设备，例如向噪声增强器的信号。此外，非线性效应对于磁记忆系统中小磁元素的超快切换至关重要。此外，该项目将为所有级别的学生提供教育和培训 - 高中生，大学生，研究生和博士后研究人员。最后，科罗拉多斯普林斯（Colorado Springs）的磁性集团（Magnetics Group）在高中级别开始，涉及人数不足的小组参与研究的良好记录，这项工作将继续进行。