Enhanced resonant magnetoelectric coupling in frequency-tunable composite multiferroic bimorph structures

We report on a giant tunable enhanced resonant magnetoelectric (ME) coupling in multiferroic magnetostrictive/piezoelectric composite based on Fe-Ni/PVDF and Metglas/PZT-fiber bimorph structures. The approach was shown to provide more than a tenfold gain in the ME coefficient, and a magnetic/electric field assisted stress-reconfigurable resonance frequency tuning, up to 100{\%}. The studies were performed by laser Doppler spectroscopy. We also show that this principle of a continuously tuned resonance that might be used to enhance sensitivity and to reject noise for ME magnetic sensors.