论文标题
铁磁双层中量化的自旋波的强耦合
Strong coupling of quantized spin waves in ferromagnetic bilayers
论文作者
论文摘要
我们与铁磁双层中的垂直站立自旋波（PSSW）与层间交换偶联（IEC）制定了强耦合理论。使用霍夫曼边界条件和界面上的能量流连续性，我们表明PSSW仍在量化但具有非整合量子数，与单层形成鲜明对比。磁杆磁结耦合的特征是频谱分裂，该光谱分裂与IEC在弱耦合区域中是线性的，但在强耦合极限下饱和。通过完全一致的完整微磁模拟来验证分析预测。
We formulate a strong-coupling theory for perpendicular standing spin waves (PSSWs) in ferromagnetic bilayers with the interlayer exchange coupling (IEC). Employing the Hoffmann boundary condition and the energy-flow continuity across the interface, we show that the PSSWs are still quantized but with non-integral quantum numbers, in sharp contrast to that of a single layer. The magnon-magnon coupling is characterized by the spectrum splitting which is linear with the IEC in the weak-coupling region, but getting saturated in the strong-coupling limit. Analytical predictions are verified by full micromagnetic simulations with good agreement.
