A ferromagnetic resonance measurement system for small volume magnetic nanowires

Yali Zhang, Joseph Um, Bethanie Stadler, Rhonda Franklin

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

Abstract

This work presents a ferromagnetic resonance (FMR) characterization system for magnetic nanowires on short-circuited coplanar waveguide (CPW) structure. The FMR frequency of cobalt (Co) nanowire chips, with three different volumes-small, medium and large, were measured and compared with Kittel equation. The FMR response of the large chip agrees well with Kittel equation with the mean difference of 0.865GHz. The small and medium chips have higher mean difference values of 1.855GHz and 2.205GHz, respectively. From the FMR response, the signal to noise ratio is reduced as the material volume decreased and resulted in less accurate FMR frequency extraction. Since the lowest detectable signal strength of VNA (Anritsu 37369D) is 0.0002, to detect FMR response accurately for this system, the volume of Co should be greater than 2. 2 ×10-4mm3 and the magnetization should be larger than 317μemu. This paper provides a framework for building identification systems such as nanolabels for low volume biosensing application.

Original languageEnglish (US)
Title of host publication2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1307-1308
Number of pages2
ISBN (Electronic)9781728106922
DOIs
StatePublished - Jul 2019
Event2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Atlanta, United States
Duration: Jul 7 2019Jul 12 2019

Publication series

Name2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings

Conference

Conference2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019
CountryUnited States
CityAtlanta
Period7/7/197/12/19

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Keywords

  • Coplanar waveguide
  • Ferromagnetic resonance
  • Magnetic nanowire array
  • Vector network analyzer

Cite this

Zhang, Y., Um, J., Stadler, B., & Franklin, R. (2019). A ferromagnetic resonance measurement system for small volume magnetic nanowires. In 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings (pp. 1307-1308). [8889110] (2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APUSNCURSINRSM.2019.8889110