论文标题
向后体积自旋波模式的分散特征的实验可视化
Experimental Visualization of Dispersion Characteristics of Backward Volume Spin Wave Modes
论文作者
论文摘要
基于空间光谱的测量（波数光谱），首先可视化了向后体积旋转波的前三个模式的分散特性，并沿着切向磁性铁矿膜中恒定均匀磁场的方向传播。该研究是通过微波探测自旋波进行的，随后在一系列频率中使用了复杂波振幅的空间傅立叶分析。发现向后体积的每一个M-the Mode旋转波可以分为N卫星模式，因为在铁氧体膜中存在具有相似磁参数的层。发现该波的第一种模式的卫星最有效地激发了，而第三模式的卫星 - 最少有效，并且随着数字N的增加，卫星激发的有效性降低。发现波的前三个模式的理论分散依赖关系与最有效的卫星模式的实验分散依赖关系很好地吻合。
Basing on the measurement of spatial spectra (spectra of wavenumbers), the dispersion characteristics of the first three modes of backward volume spin wave, propagating along the direction of a constant uniform magnetic field in a tangentially magnetized ferrite film, were visualized firstly. The study was carried out by microwave probing of spin waves with subsequent use of spatial Fourier analysis of the complex wave amplitude for a series of frequencies. It was found that every m-th mode of the backward volume spins wave can be split into n satellite modes due to the existence of layers with similar magnetic parameters in ferrite film. It was found that satellites of the first mode of this wave are excited most effectively, while satellites of the third mode - least effectively, and the effectiveness of satellites excitation decreases as the number n increases. It is found that the theoretical dispersion dependencies of the first three modes of the wave coincide well with the experimental dispersion dependencies of the satellite mode that are excited most effectively.
