FeCoHf films with different Hf contents and thicknesses were deposited by composition-gradient sputtering. The results showed that the stripe domain (SD) structure emerges when the film thickness exceeds a critical thickness (220–330 nm), but the increase in introduced Hf leads to a decrease in magnetization, and in turn, the stripe phase weakens and eventually disappears. Dynamic measurements revealed magnetic domain-dependent resonant absorption spectra with up to seven resonance peaks, which have rarely been observed in magnetic film with an established SD structure. The number of resonant peaks can be controlled by the saturation magnetization of the film. Micromagnetic simulations indicate that multiple magnetic domain resonance modes can be attributed to the enhanced magnetization, which induces an increase in the magnetic domain wall volume. These results emphasize the pivotal role of magnetic domain dynamics in the framework of spintronic and microwave devices.

中文翻译：

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磁化增强了条畴薄膜中多磁畴主导的共振模式

通过成分梯度溅射沉积了具有不同 Hf 含量和厚度的 FeCoHf 薄膜。结果表明，当薄膜厚度超过临界厚度（220-330 nm）时，条纹畴（SD）结构出现，但引入的 Hf 的增加导致磁化强度降低，反过来，条纹相减弱并最终消失。动态测量揭示了具有多达七个共振峰的磁畴相关共振吸收光谱，这在具有既定 SD 结构的磁性薄膜中很少被观察到。谐振峰的数量可以通过薄膜的饱和磁化强度来控制。微磁模拟表明，多个磁畴共振模式可归因于增强的磁化强度，这会导致磁畴壁体积的增加。