论文标题
由于四麦克农散射而导致的木纳运输中的非线性损失
Nonlinear losses in magnon transport due to four-magnon scattering
论文作者
论文摘要
我们报告了非线性四麦克农散射对微结构CO25FE75波导的磁酮转运的影响，其磁阻尼低。我们确定了镁繁殖长度，并在广泛的激发能力上进行了微焦点的Brillouin光散射，并检测到高功率下的衰减长度的减小。这与非线性四麦克农散射的开始是一致的。因此，在从镁传播长度中得出阻尼参数时，保持在线性状态至关重要。否则，磁化动力学的固有非线性可能导致对镁传播长度的误解，从而导致系统磁阻尼的不正确值。
We report on the impact of nonlinear four-magnon scattering on magnon transport in microstructured Co25Fe75 waveguides with low magnetic damping. We determine the magnon propagation length with microfocused Brillouin light scattering over a broad range of excitation powers and detect a decrease of the attenuation length at high powers. This is consistent with the onset of nonlinear four-magnon scattering. Hence, it is critical to stay in the linear regime, when deriving damping parameters from the magnon propagation length. Otherwise, the intrinsic nonlinearity of magnetization dynamics may lead to a misinterpretation of magnon propagation lengths and, thus, to incorrect values of the magnetic damping of the system.
