手性孤子晶格主体YbNi3Al9中的非平衡自旋动力学

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-07-18 DOI:10.1016/j.rinp.2025.108336

Yamei Wang , Haonan Jin , Jiefeng Cao , Rui Yu , Junqin Li , Wei Tong , Junmin Xu , Fangyuan Zhu , Yong Wang , Lei Zhang , Renzhong Tai

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引用次数: 0

摘要

提出了单轴手性磁性材料YbNi3Al9作为手性孤子晶格（CSL）的载体。在这项研究中，我们利用磁化(M)弛豫和电子自旋共振（ESR）技术深入研究了YbNi3Al9单晶的自旋动力学。m -弛豫分析清楚地揭示了YbNi3Al9非平衡态CSL的特征。在高度非线性的csl态中观察到一个延长的弛豫，表明手性磁孤子湮灭或成核过程中的非平衡自旋动力学，与未受挫磁簇模型一致。ESR研究显示，当磁场垂直于c轴（H⊥c）时，会有显著的微波响应，而当磁场与c轴（H//c）对齐时，则会观察到微弱的响应。对于H⊥c有两条共振线。低场下的共振信号归因于手性磁孤子的Goldstone激发，而高场下的共振信号与铁磁共振有关。这些发现增强了我们对YbNi3Al9单晶CSL的非平衡自旋动力学的理解，有利于手性磁孤子在自旋电子学中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Nonequilibrium spin dynamics in the chiral soliton lattice host YbNi3Al9

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Nonequilibrium spin dynamics in the chiral soliton lattice host YbNi3Al9

The uniaxial chiral magnetic material YbNi₃Al₉ is proposed as a host for a chiral soliton lattice (CSL). In this study, we thoroughly investigate the spin dynamics in YbNi₃Al₉ single crystals using magnetization (

M

)-relaxation and electron spin resonance (ESR) techniques. The

M

-relaxation analysis clearly reveals characteristics of a nonequilibrium CSL in YbNi₃Al₉. A prolonged relaxation is observed in the highly-nonlinear-CSL state, indicating nonequilibrium spin dynamics during the annihilation or nucleation of chiral magnetic solitons, consistent with the unfrustrated magnetic cluster model. The ESR study shows significant microwave responses when the magnetic field is applied perpendicular to the

c

-axis (

H ⊥ c

), while a weak response is observed when the field is aligned with the

c

-axis (

H / / c

). Two resonance lines are identified for

H ⊥ c

. The resonance signal at lower fields is attributed to the Goldstone excitation of chiral magnetic solitons, while the signal at higher fields is associated with ferromagnetic resonance. These findings enhance our understanding of the nonequilibrium spin dynamics of the CSL in YbNi₃Al₉ single crystals and are beneficial for the application of chiral magnetic solitons in spintronics.

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

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