Magnetic Nanowires for RF applications: Ferromagnetic Resonance and Permeability Characterization
Magnetic Nanowires for RF applications: Ferromagnetic Resonance and Permeability Characterization
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DOI：
10.1109/mwsym.2019.8700826
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
Yali Zhang;J. Um;Wen-ming Zhou;B. Stadler;Rhonda R. Franklin
中科院分区：
文献类型：
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作者：
Yali Zhang;J. Um;Wen-ming Zhou;B. Stadler;Rhonda R. Franklin
磁性纳米线在非互易器件设计和纳米医学应用中的细胞标记等新兴领域显示出很大的潜力。然而，一个挑战是如何以简单的方式获得铁磁共振频率（FMR）和复磁导率。在本研究中，一个直通线和短路共面波导电路被用来获得FMR在直流磁场和频域，分别。研究了各种因素，以了解磁场吸收如何受到电路上样品放置的影响，FMR如何受到线轴和DC场之间的角度的影响，以及如何从反射数据中提取复磁导率。采用薄膜研究中常用的“四步”方法[1]-[3]，我们得到了钴纳米线（pH=2）在0.4T下的FMR为27 GHz，复磁导率值分别为μ′ =7和μ″ = 4.5。
Magnetic nanowires show promising potential in non-reciprocal device design and emerging areas like cells labeling in nano-medicine applications. One challenge, however, is how to obtain ferromagnetic resonance frequency (FMR) and complex permeability in a simplistic manner. In this study, a through line and short-circuited CPW circuits were used to obtain FMR in DC magnetic field and frequency domains, respectively. Factors were investigated to understand how magnetic field absorption is affected by sample placement on the circuit, how FMR is impacted by the angle between wire axis and DC field, and how complex permeability can be extracted from the reflection data. Using the "four steps" method which was commonly used for thin films [1]–[3], we obtain FMR of 27 GHz at 0.4T and complex permeability values of μ′ =7 and μ″ = 4.5, respectively for cobalt nanowires (pH=2).