Magnetoelectric properties of Fe–Ga/BaTiO3 laminate composites

Magnetostrictive and piezoelectric laminate composites of Fe–Ga and BaTiO3 have been studied. The magnetoelectric (ME) coefficients have been characterized for the transversely magnetized and transversely polarized transverse–transverse (TT) mode. At lower frequencies, the ME voltage coefficient of the laminate was 12.5 mV/Oe. Near the natural resonant frequency (∼95 kHz) of the laminate, the ME voltage coefficient was found to be dramatically increased to 28.5 mV/Oe. In addition, the induced ME voltages were near linear functions of AC magnetic field.

Research highlights▶ Since Fe–Ga has high sensitivity in low magnetic field and BTO contains nothing injurious to the environment, it can be a new choice of the laminate for using to make ME devices. We investigate the magnetoelectric properties of Fe–Ga/BTO laminate composites operated in transverse–transverse mode.