Coupled skyrmion breathing modes in synthetic ferri- and antiferromagnets
Coupled skyrmion breathing modes in synthetic ferri- and antiferromagnets
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DOI：
10.1103/physrevb.102.104403
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发表时间：
2020-03
影响因子：
3.7
通讯作者：
Martin Lonsky;A. Hoffmann
中科院分区：
文献类型：
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作者：
Martin Lonsky;A. Hoffmann
我们提出了微磁学模拟的动态GHz范围内的共振模式的skyrmions激发的平面外交流磁场或自旋扭矩的原型合成铁和反铁磁三层结构。在计算的功率谱中观察到的特征表现出系统的依赖于各个磁性层之间的耦合强度，并且与纯同相和反相呼吸模式以及呼吸和自旋波模式的杂交有关，所述呼吸和自旋波模式是所考虑的圆形几何形状的特征。这些共振振荡模式的实验检测可以提供一种手段，skyrmion传感应用程序和反铁磁层间交换耦合的多层堆栈中的skyrmion状态的一般表征。
We present micromagnetic simulations of the dynamic GHz-range resonance modes of skyrmions excited by either out-of-plane AC magnetic fields or spin torques in prototypical synthetic ferri- and antiferromagnetic trilayer structures. The observed features in the calculated power spectra exhibit a systematic dependence on the coupling strength between the individual magnetic layers and are related to pure in-phase and antiphase breathing modes as well as to hybridizations of breathing and spin-wave modes that are characteristic for the considered circular-shaped geometry. The experimental detection of these resonant oscillation modes may provide a means for skyrmion-sensing applications and for the general characterization of skyrmion states in multilayer stacks with antiferromagnetic interlayer exchange coupling.