论文标题
旋转波动激发以交换有偏见的IRMN/COFE双层
Spin wave excitations in exchange biased IrMn/CoFe bilayers
论文作者
论文摘要
使用原子自旋模型，我们从交换耦合的COFE层中模拟了自旋波注射和传播到抗磁性IRMN中。流出的自旋波的光谱特征具有由反铁磁顺序的非共线性产生的复杂跳动行为。我们发现系统的频率响应在很大程度上取决于振荡场激发的强度和频率。我们还发现，激发自旋波的强度会以频率依赖的衰减从界面层衰减。我们的发现表明，耦合的铁磁铁产生的自旋波太弱，即使在耦合的铁磁体的共鸣激发中，也无法在整体上逆转IRMN。然而，由于IRMN旋转顺序的非共线特性，有效地注入了抗铁磁铁。
Using an atomistic spin model, we have simulated spin wave injection and propagation into antiferromagnetic IrMn from an exchange coupled CoFe layer. The spectral characteristics of the exited spin waves have a complex beating behavior arising from the non-collinear nature of the antiferromagnetic order. We find that the frequency response of the system depends strongly on the strength and frequency of oscillating field excitations. We also find that the strength of excited spin waves strongly decays away from the interfacial layer with a frequency dependent attenuation. Our findings suggest that spin waves generated by coupled ferromagnets are too weak to reverse IrMn in their entirety even with resonant excitation of a coupled ferromagnet. However, efficient spin wave injection into the antiferromagnet is possible due to the non-collinear nature of the IrMn spin ordering.
