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 -, 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).
|Original language||English (US)|
|Title of host publication||2019 IEEE MTT-S International Microwave Symposium, IMS 2019|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|State||Published - Jun 2019|
|Event||2019 IEEE MTT-S International Microwave Symposium, IMS 2019 - Boston, United States|
Duration: Jun 2 2019 → Jun 7 2019
|Name||IEEE MTT-S International Microwave Symposium Digest|
|Conference||2019 IEEE MTT-S International Microwave Symposium, IMS 2019|
|Period||6/2/19 → 6/7/19|
Bibliographical noteFunding Information:
Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundation through the National Nano Coordinated Infrastructure Network, Award Number NNCI -1542202.
ACKNOWLEDGMENT This work was supported by the National Science Foundation Award ECCS #1509543, MN Futures of the University of Minnesota, the Skippy Frank Fund for Life Sciences and Translational Research, and Animal Cancer Care and Research Program of the University of Minnesota.
- Magnetic nanowires
- coplanar waveguide
- ferromagnetic resonance
- vector network analyzer