Influence of the Vertex Region on Spin Dynamics in Artificial Kagome Spin Ice
Influence of the Vertex Region on Spin Dynamics in Artificial Kagome Spin Ice
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DOI：
10.1103/physrevapplied.14.014079
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发表时间：
2020-07-27
影响因子：
4.6
通讯作者：
Jungfleisch, M. Benjamin
中科院分区：
文献类型：
--
作者：
Bang, Wonbae;Sturm, James;Jungfleisch, M. Benjamin
我们目前的实验和理论研究的自旋波模式动力学在人工kagome自旋冰顶点由三个相同的15纳米厚的细长Ni 80 Fe 20纳米岛（macrospins）。我们考虑了几种可能的配置，从完全脱节的宏自旋（全偶极元素间相互作用），以完全连接的宏自旋（全偶极交换相互作用）。使用角度分辨磁场相关的宽带铁磁共振（FMR），我们证明了发生的模式定位在顶点区域所示的不同行为的FMR谱在不同的角度和配置。使用微磁模拟的理论计算支持这种模式的存在，ori-gin和行为解释为本地化，准均匀Kittel模式。我们的研究结果铺平了道路，设计最合适的网络组成的铁磁纳米磁体的特定应用目的在磁。
We present experimental and theoretical studies of spin-wave mode dynamics in artificial kagome spin ice vertices made of three identical 15-nm thick elongated Ni80Fe20 nanoislands (macrospins). We consider several possible configurations, from completely disjointed macrospins (full dipolar interelement interac-tions) to fully jointed macrospins (full dipolar-exchange interactions). Using angular-resolved magnetic field dependent broadband ferromagnetic resonance (FMR), we demonstrate the occurrence of a mode localized in the vertex region as indicated by the distinct behavior of the FMR spectra at different angles and configurations. Theoretical calculations using micromagnetic simulations support the existence, ori-gin, and behavior of this mode by interpreting it as a localized, quasi-uniform Kittel mode. Our findings pave the way for designing the most appropriate network consisting of ferromagnetic nanomagnets for specific application purposes in magnonics.