发表机构
University of Valladolid（巴利亚多利德大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过角动量密度流连续性解析计算铁磁界面自旋波反射系数与波包络，并经微磁模拟验证，为低损耗自旋波器件设计提供理论依据。
AI 中文摘要
磁子学（Magnonics）研究磁有序介质中的动态激发，即自旋波，及其在功能化器件中的应用。为了高效控制基于自旋波的器件，同时最大限度地减少损耗以及来自不必要反射的干扰，需要清晰理解散射机制。在此，我们聚焦于两种铁磁介质界面处产生的自旋波的反射。我们证明，基于角动量密度流的连续性可以理解反射机制。这一约束使我们能够解析计算第一介质中的反射系数和驻波包络，以及第二介质中的阻尼传播。此外，解析表达式与完整的微磁模拟进行了比较，显示出极好的一致性。
英文摘要
Magnonics investigates the dynamic excitations of magnetically ordered media, known as spin waves, and their application in functionalized devices. To efficiently control spin wave based devices minimizing losses and interferences from unwanted reflections, a clear picture of the scattering mechanism is needed. Here, we focus on the reflection of spin waves produced at the interface between two ferromagnetic media. We show that it is possible to understand the reflection mechanism based on the continuity of the angular momentum density flux. This constraint allows us to analytically compute the reflection coefficient and the stationary wave envelope in the first medium, as well as the damped propagation in the second. In addition, the analytical expressions are compared with full micromagnetic simulations, showing excellent agreement.
