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Published on: April 8, 2018
Magnetoelectric bending-mode structure based on Metglas/Pb(Zr,Ti)O₃ fiber laminates
Junqi Gao1, Ying Shen, Yaojin Wang
1Materials Science and Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA. junqi08@vt.edu
Summary
A novel magnetoelectric bending-mode structure using Metglas/Pb(Zr,Ti)O(3) fibers exhibits a low fundamental resonance frequency. This offers a sensitive magnetic sensor with a low noise floor near resonance.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Magnetoelectric (ME) effects enable coupling between magnetic and electric properties.
- Fiber-based laminate structures offer unique mechanical and electrical characteristics.
- Low-frequency magnetic sensors are crucial for various applications.
Purpose of the Study:
- To investigate a bending-mode magnetoelectric structure.
- To characterize its fundamental resonance frequency and ME voltage coefficient.
- To evaluate its performance as a magnetic sensor.
Main Methods:
- Fabrication of Metglas/Pb(Zr,Ti)O(3) fiber laminates.
- Resonance frequency measurement using an impedance analyzer.
- ME voltage coefficient determination near resonance.
- Equivalent magnetic noise floor measurement.
Main Results:
- The bending mode exhibited a fundamental resonance frequency (FBR) around 210 Hz.
- A high ME voltage coefficient of approximately 400 V/cm·Oe was observed near FBR.
- The magnetic sensor demonstrated an equivalent magnetic noise floor as low as 0.3 pT/√Hz at 210 Hz.
Conclusions:
- The Metglas/Pb(Zr,Ti)O(3) fiber laminate bending mode is effective for low-frequency magnetic sensing.
- The low FBR and high ME voltage coefficient contribute to excellent sensor sensitivity.
- This structure shows promise for developing highly sensitive magnetic field detectors.
