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Enhancement of Giant Magneto-Impedance in Series Co-Rich Microwires for Low-Field Sensing Applications

  • S. D. Jiang
  • , T. Eggers
  • , O. Thiabgoh
  • , D. W. Xing
  • , W. B. Fang
  • , J. F. Sun*
  • , H. Srikanth
  • , M. H. Phan
  • *Corresponding author for this work
  • Harbin Institute of Technology
  • University of South Florida
  • Harbin University of Science and Technology

Research output: Contribution to journalArticlepeer-review

Abstract

Two soft ferromagnetic Co68.25Fe4.25Si12.25B15.25 microwires with the same diameter of 50 ± 1 μm but different fabrication processes were placed in series and in parallel circuit configurations to investigate their giant magneto-impedance (GMI) responses in a frequency range of 1–100 MHz for low-field sensing applications. We show that, while the low-field GMI response is significantly reduced in the parallel configuration, it is greatly enhanced in the series connection. These results suggest that a highly sensitive GMI sensor can be designed by arranging multi-wires in a saw-shaped fashion to optimize the sensing area, and soldered together in series connection to maintain the excellent magnetic field sensitivity.

Original languageEnglish
Pages (from-to)2667-2672
Number of pages6
JournalJournal of Electronic Materials
Volume47
Issue number5
DOIs
StatePublished - 1 May 2018
Externally publishedYes

Keywords

  • Magnetic microwire
  • circuit design
  • magnetic sensors
  • magneto-impedance

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