RUI: Dynamics of Nonlinear Spin Waves in Magnetic Films: Envelope Solitons, Self-Focusing, Wave Collapse

9701640 Slavin这是一笔用于支持奥克兰大学（一个以本科生为主的机构）研究的拨款。该研究项目包括有限介质（即设备）中的非线性磁性和激励的理论研究。本基金具体项目有：(1)有限孔径SW光束和脉冲在磁膜中的二维非线性衍射导致自通道、自聚焦和波坍缩；(2)弱耗散磁膜中一维“亮”和“暗”自旋波包络孤子的形成和传播；(3)外微波泵浦对磁膜中“亮”包络孤子的参数放大。研究结果对基于磁膜非线性自旋波过程的微波信号处理装置的开发具有重要的指导意义。该基金支持在一个以本科生为主的机构进行关于器件磁性问题的理论研究。该研究有望促进我们对磁性介质中非线性波动动力学的理解，并应用于更好地理解微波技术中使用的高质量石榴石薄膜的性质。该项目涉及国际公认的活跃研究项目框架内的本科生。＊＊＊

9701640 Slavin This is a grant to support research at a largely Undergraduate Institution, the Oakland University. The research program consists of a theoretical study of nonlinear magnetism and excitations in finite media, i.e. devices. The specific projects in this grant are: (1) Two dimensional nonlinear diffraction of finite aperture SW beams and pulses in magnetic films leading to self channeling, self focusing and wave collapse; (2) Formation and propagation of one dimensional "bright" and "dark" spin- wave envelope solitons in weakly dissipative magnetic films and (3) parametric amplification of "bright" envelope solitons in magnetic films by external microwave pumping. Results of this research will be useful for the development of microwave signal processing devices based on nonlinear spin wave processes in magnetic films. %%% This grant supports theoretical research at a predominantly undergraduate institution on a problem in device magnetism. The research is expected to advance our understanding of nonlinear wave dynamics in a magnetic medium and has applications to a better understanding of the properties of high quality garnet films as used in microwave technology. The project involves undergraduate students within the framework of an internationally acknowledged active research program. ***