We investigate the magnetic field dependence of the spin excitation spectra of the chiral soliton lattice (CSL) in the helimagnet CrNb 3 S 6, by means of microwave resonance spectroscopy. The CSL is a prototype of a noncollinear spin system that forms periodically over a macroscopic length scale. Following the field initialization of the CSL, we found three collective resonance modes over an exceptionally wide frequency range. Upon further reducing the magnetic field toward 0 T, the spectral weight of these collective modes was disrupted by the emergence of additional resonances whose Kittel-like field dependence was linked to coexisting field polarized magnetic domains. The collective behavior at a macroscopic level was only recovered upon reaching the helical magnetic state at 0 T. The magnetic history of this noncollinear spin system can be utilized to control microwave absorption, with potential use in magnon-driven devices.We investigate the magnetic field dependence of the spin excitation spectra of the chiral soliton lattice (CSL) in the helimagnet CrNb 3 S 6, by means of microwave resonance spectroscopy. The CSL is a prototype of a noncollinear spin system that forms periodically over a macroscopic length scale. Following the field initialization of the CSL, we found three collective resonance modes over an exceptionally wide frequency range. Upon further reducing the magnetic field toward 0 T, the spectral weight of these collective modes was disrupted by the emergence of additional resonances whose Kittel-like field dependence was linked to coexisting field polarized magnetic domains. The collective behavior at a macroscopic level was only recovered upon reaching the helical magnetic state at 0 T. The magnetic history of this noncollinear spin system can be utilized to control microwave absorption, with potential use in magnon-driven devices.

中文翻译：

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手征孤子晶格集体自旋动力学的场驱动恢复

我们通过微波共振光谱研究了螺旋磁体 CrNb 3 S 6 中手性孤子晶格 (CSL) 的自旋激发光谱的磁场依赖性。CSL 是一个非共线自旋系统的原型，它在宏观长度尺度上周期性地形成。在 CSL 的场初始化之后，我们在极宽的频率范围内发现了三种集体共振模式。在进一步将磁场降低到 0 T 后，这些集体模式的光谱权重被其他共振的出现所破坏，这些共振的基特尔式场依赖性与共存的场极化磁畴有关。宏观水平的集体行为仅在 0 T 达到螺旋磁态时才恢复。这种非共线自旋系统的磁历史可用于控制微波吸收，在磁振子驱动装置中具有潜在用途。我们研究了螺旋磁体 CrNb 3 S 中手性孤子晶格 (CSL) 的自旋激发光谱的磁场依赖性6、借助微波共振光谱法。CSL 是一个非共线自旋系统的原型，它在宏观长度尺度上周期性地形成。在 CSL 的场初始化之后，我们在极宽的频率范围内发现了三种集体共振模式。在进一步将磁场降低到 0 T 后，这些集体模式的光谱权重被其他共振的出现所破坏，这些共振的基特尔式场依赖性与共存的场极化磁畴有关。