Face-shear 36-mode magnetoelectric composites with piezoelectric single crystal and Metglas laminate

A magnetoelectric (ME) composite is designed with a face-shear 36-mode PMN-PZT single crystal and a Metglas laminate structure to enhance the ME coupling properties and exhibit single resonance behavior over a wide-frequency range. The off resonance and resonance ME voltage coefficients of the designed-composite are high, and approximately 90% similar to those of the 32-mode. While the 32-mode has multiple resonance, the electromechanical and magnetoelectric resonance spectra of the 36-mode composite exhibit only a single resonance over a wide-frequency range from 50 to 200 kHz making it suitable for detecting specific frequency magnetic fields. In addition, it is highly sensitive, being able to detect a magnetic field down to 2 pT at resonance (103 kHz), and therefore has potential to replace conventional bulky and costly magnetic field sensors.