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

[0072017 . slavin]这项RUI资助是对这个以本科生为主的大学的职业中期项目研究的继续支持。该拨款包括与乌克兰的G. a . Melkov合作，并由INT部门共同资助。PI在研究磁性薄膜中的非线性自旋波现象方面有着杰出的记录。总的来说，他的兴趣在于研究色散、衍射和弱耗散介质中的非线性波动动力学。这一更新资助的重点是一维和二维非线性自旋波，包括(1)由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)使用非平稳参数泵浦来放大或扭转包络孤子或使用3波相互作用的二维自旋波弹。此外，还将进一步研究孤子与弹丸之间的碰撞以及微米级磁点阵列中自旋波谱的尺寸相关量子化。这项资助在本科院校进行的研究也包括对强有力的国际合作的支持。它是由情报部门共同资助的。该基金支持PI继续研究非线性自旋波。这些是磁铁中的大振幅磁化波，偶尔具有非凡的特性，然后这些波（类似于磁化墙）被称为孤子。在另一种情况下，波也像子弹。这里的研究涉及孤子和子弹的特性，它们是如何产生的，它们的运动如何受到环境中微小而缓慢的变化的影响，它们是如何相互碰撞的，以及之后会发生什么。这项工作将与乌克兰和俄罗斯的同事合作进行

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.***