Mamica S
Faculty of Physics, ISQI, A. Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 2, Poznań, 61-614, Poland.
Sci Rep. 2024 Oct 3;14(1):22966. doi: 10.1038/s41598-024-74923-2.
We present the results of studies on the non-uniform frequency shift of spin wave spectrum in a two-dimensional magnonic crystal of cobalt/permalloy under the influence of external magnetic field changes. We investigate the phenomenon of coupling of modes and, as a consequence, their hybridization. By taking advantage of the fact that compressing the crystal structure along the direction of the external magnetic field leads to an enhancement of the demagnetizing field, we analyse its effect on the frequency shift of individual modes depending on their concentration in Co. We show that the consequence of this enhancement is a shift in the coupling of modes towards higher magnetic fields. This provides a potential opportunity to design which pairs of modes and in what range of fields hybridization will occur.
我们展示了在外部磁场变化影响下，钴/坡莫合金二维磁振子晶体中自旋波谱非均匀频移的研究结果。我们研究了模式耦合现象及其导致的模式杂化。利用沿外部磁场方向压缩晶体结构会导致退磁场增强这一事实，我们分析了其对单个模式频移的影响，该影响取决于它们在钴中的浓度。我们表明，这种增强的结果是模式耦合向更高磁场方向的移动。这为设计哪些模式对以及在什么磁场范围内会发生杂化提供了潜在机会。
