Magnetic Nanowires for RF applications: Ferromagnetic Resonance and Permeability Characterization

Yali Zhang, Joseph Um, Wen Zhou, Bethanie Stadler, Rhonda Franklin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

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).

Original languageEnglish (US)
Title of host publication2019 IEEE MTT-S International Microwave Symposium, IMS 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1100-1103
Number of pages4
ISBN (Electronic)9781728113098
DOIs
StatePublished - Jun 2019
Event2019 IEEE MTT-S International Microwave Symposium, IMS 2019 - Boston, United States
Duration: Jun 2 2019Jun 7 2019

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2019-June
ISSN (Print)0149-645X

Conference

Conference2019 IEEE MTT-S International Microwave Symposium, IMS 2019
CountryUnited States
CityBoston
Period6/2/196/7/19

Bibliographical note

Funding 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.

Funding Information:
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.

Keywords

  • Magnetic nanowires
  • coplanar waveguide
  • ferromagnetic resonance
  • vector network analyzer

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