RUI: Dynamics of Linear and Nonlinear Spin Waves in Magnetic Films

RUI：磁性薄膜中线性和非线性自旋波的动力学

• 批准号: 0072017
• 负责人: Andrei Slavin
• 金额: $ 10.5万
• 依托单位: Oakland University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0072017&HistoricalAwards=false
• 关键词: RUI; Dynamics; Linear; Nonlinear; Spin

0072017SlavinThis RUI grant is a continuation of support of the research of this mid-career PI at a predominantly undergraduate institution. This grant contains a collaboration with G. A. Melkov, Ukraine, and has been co-funded by the INT division. The PI has an illustrious record in the study of nonlinear spin-wave phenomena in thin magnetic films. In general his interests lie in the study of nonlinear wave dynamics in dispersive, diffractive and weakly dissipative media. This renewal grant focuses on 1-d and 2-d nonlinear spin waves, including (1) generation of bright spin wave envelope solitons by a linear source, (2) non-adiabatic interaction of a propagating wave packet with strongly localized parametric pumping and (3) Use of non stationary parametric pumping to amplify or turn around envelope solitons or 2-d spin wave bullets using 3-wave interaction. In addition there will be further study of collisions between solitons and bullets and of size dependent quantization of spin wave spectrum in an array of micron size magnetic dots.%%%This RUI grant for research in an undergraduate institution also contains support for a strong international collaboration. It has been co-funded by the INT division. The grant supports a continuation of the PI's research program on non-linear spin waves. These are large amplitude magnetization waves in a magnet, which occasionally have extraordinary properties and the waves then (similar to a wall of magnetization) are called solitons. In another circumstances, the waves also resemble bullets. The research here concerns the properties of solitons and bullets, how they can be created, how there motion can be affected by small and slow changes in the environment, how they bump into each other and what happens afterwards. The work will be carried out in collaboration with colleagues in Ukraine and Russia.***

这笔助学金是对这位职业生涯中期的PI在一所以本科生为主的机构进行研究的继续支持。这笔赠款包括与乌克兰G.A.梅尔科夫的合作，并由INT司共同提供资金。PI在研究磁性薄膜中的非线性自旋波现象方面有着卓越的记录。总的来说，他的兴趣在于研究色散、绕射和弱耗散介质中的非线性波动动力学。这一新的授权集中于一维和二维非线性自旋波，包括(1)线性源产生明亮的自旋波包络孤子，(2)传播波包与强局域参数泵浦的非绝热相互作用，以及(3)使用非定常参数泵浦来放大包络孤子或利用3波相互作用扭转包络孤子或二维自旋波子弹。此外，还将进一步研究孤子与子弹之间的碰撞，以及微米大小磁点阵列中自旋波谱的大小相关量子化。%本科生研究所的这项研究拨款还包括对强有力的国际合作的支持。它是由INT部门共同出资的。这笔赠款支持了国际和平研究所关于非线性自旋波的研究计划的继续。这些是磁体中的大幅度磁化波，有时会具有特殊的性质，然后这些波(类似于磁化墙)被称为孤子。在另一种情况下，海浪也类似于子弹。这里的研究涉及孤子和子弹的性质，它们是如何产生的，它们的运动如何受到环境中微小和缓慢的变化的影响，它们如何相互碰撞，以及随后会发生什么。这项工作将与乌克兰和俄罗斯的同事合作进行。