Reflection of forward volume exchange spin waves at ferromagnetic junctions interpreted via continuity of angular momentum density flux
Abstract
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.
Related
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BibTeX
@misc{sancheztejerina2026reflection,
title = {{Reflection of forward volume exchange spin waves at ferromagnetic junctions interpreted via continuity of angular momentum density flux}},
author = {Luis Sánchez-Tejerina and Luis M. Moreno-Ramírez and Óscar Alejos Ducal},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.08081},
eprint = {2610.08081},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.08081},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Reflection of forward volume exchange spin waves at ferromagnetic junctions interpreted via continuity of angular momentum density flux
AU - Luis Sánchez-Tejerina
AU - Luis M. Moreno-Ramírez
AU - Óscar Alejos Ducal
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2610.08081
UR - https://arxiv.org/abs/2610.08081
AB - 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.
ER -