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Ultra-magnetic field sensitive magnetoelectric composite with sub-pT detection limit at low frequency enabled by flash photon annealing

  • Mahesh Peddigari
  • , Kyoohee Woo
  • , Sung Dae Kim
  • , Min Sub Kwak
  • , Jae Won Jeong
  • , Jee Hyun Kang
  • , Seung Hyun Lee
  • , Jung Hwan Park
  • , Kwi Il Park
  • , Venkateswarlu Annapureddy
  • , Jongmoon Jang
  • , Yuho Min
  • , Cheol Woo Ahn
  • , Jong Jin Choi
  • , Byung Dong Hahn
  • , Woon Ha Yoon
  • , Jungho Ryu
  • , Geon Tae Hwang
  • Korea Institute of Materials Science
  • Korea Institute of Machinery and Materials
  • Yeungnam University
  • Kumoh National Institute of Technology
  • National Institute of Technology Tiruchirappalli
  • Pukyong National University

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

An ultra-sensitive magnetic field detector is demonstrated in a bilayer magnetoelectric (ME) composite structure employing a flash photon annealing (FPA) treated amorphous Metglas (FeBSi) alloy and piezoelectric single crystal macro fiber composites (SFC). A millisecond FPA annealing approach altered the magnetostrictive and mechanical properties of Metglas by annealing at a high temperature without inducing severe embrittlement. The ME composite (MEC) fabricated with FPA-treated Metglas (FPA-MEC) exhibited an enhanced ME coupling coefficient (at a resonance condition ~47% and at an off-resonance condition ~52%) relative to that of untreated Metglas based ME composite (pristine MEC), owing to the improved magnetic flux concentration/piezo-magnetic coefficient and reduced resonance loss in Metglas. This led to the realization of an ultra-sensitive magnetic field sensor with a direct detection limit of 0.5 pT [1 order improved performance compared to the pristine MEC (sensing limit of 5 pT)] at an extremely low resonance frequency condition (< 100 Hz). The obtained results demonstrate a feasible way to design magnetic sensors for detecting bio-magnetic and extremely low-frequency (ELF) magnetic fields under ambient conditions.

Original languageEnglish
Article number106598
JournalNano Energy
Volume90
DOIs
StatePublished - Dec 2021

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • Flash photon annealing (FPA)
  • Limit of detection
  • Magnetic sensitivity
  • Magnetoelectric
  • Nanocrystallization

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