Field driven recovery of the collective spin dynamics of the chiral soliton lattice
Field driven recovery of the collective spin dynamics of the chiral soliton lattice
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DOI：
10.1063/1.5131067
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发表时间：
2020-01
影响因子：
4
通讯作者：
F. Goncalves;Y. Shimamoto;T. Sogo;G. Paterson;Y. Kousaka;Y. Togawa
中科院分区：
文献类型：
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作者：
F. Goncalves;Y. Shimamoto;T. Sogo;G. Paterson;Y. Kousaka;Y. Togawa
用微波共振谱的方法研究了CrNb3 S 6中手性孤子晶格的自旋激发谱随磁场的变化规律。CSL是一个在宏观长度尺度上周期性形成的非共线自旋系统的原型。在CSL的场初始化之后，我们在一个异常宽的频率范围内发现了三个集体共振模。在进一步将磁场降低到0T时，这些集体模的谱权重被附加共振的出现所扰乱，这些共振的基特尔样场依赖于共存的场极化磁区。只有在0T达到螺旋磁态时，才能恢复宏观水平上的集体行为。这种非共线自旋系统的磁历史可以用来控制微波吸收，在磁非驱动器件中具有潜在的应用。我们用微波共振光谱的方法研究了螺旋线CrNb3 S 6中手性孤子晶格的自旋激发谱随磁场的变化。CSL是一个在宏观长度尺度上周期性形成的非共线自旋系统的原型。在CSL的场初始化之后，我们在一个异常宽的频率范围内发现了三个集体共振模。在进一步将磁场降低到0T时，这些集体模的谱权重被附加共振的出现所扰乱，这些共振的基特尔样场依赖于共存的场极化磁区。只有在0T达到螺旋磁态时，宏观水平上的集体行为才能恢复。这种非共线自旋系统的磁历史可以用于控制微波吸收，在磁非驱动器件中具有潜在的应用前景。
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.