Fabrication and Characterization of High-Performance Polymer-Based Magnetoelectric DC Magnetic Field Sensors Devices

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Reis, S (Author) Other; Castro, N (Author) Other; Silva, MP (Author) Other; Correia, V (Author) Other; Rocha, JG (Author) Other; Martins, P (Author) Other; Lanceros Mendez, S (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

Vol. 64

Pages: 4928-4934

ISSN: 0278-0046

Indexing

ISI Web of Knowledge - 34 Citations

Scopus - 35 Citations

Other information

Authenticus ID: P-013-WF3

DOI: 10.1109/tie.2017.2668989

Abstract (EN): The development of a DC magnetic field sensor based on a magnetoelectric (ME) PVDF/Metglas composite is reported. The ME sensing composite has an electromechanical resonance frequency close to 25.4 kHz, a linear response (r2 = 0.997) in the 0-2 Oe DC magnetic field range, and a maximum output voltage of 112 mV (ME voltage coefficient ¿33 of ~30 V·cm-1·Oe-1). By incorporating a charge amplifier, an AC-RMS converter and a microcontroller with an on-chip analog-to-digital converter, the ME voltage response is not distorted, the linearity is maintained, and the ME output voltage increases to 3.3 V (¿33effective = 1000 V·cm-1·Oe-1). The sensing device, including the readout electronics, has a maximum drift of 0.12 Oe with an average total drift of 0.04 Oe, with a sensitivity of 1.5 V·Oe-1 (15 kV·T-1), and a 70 nT resolution. This feature is for the first time reported on a polymer- based ME device and compares favourably with a reference Hall sensor that showed a maximum drift of 0.07 Oe and an average error of 0.16 Oe, 5 V·T-1 sensitivity, and 2 ¿T resolution. Such properties allied to the accurate measurement of the DC magnetic field (HDC) in the 0-2 Oe range make this polymer-based device very attractive for applications, such as Earth magnetic field sensing, digital compasses, navigation, and magnetic field anomaly detectors, among others.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7