Low-frequency nonlinear magnetoelectric effects in a ferrite-piezoelectric multilayer

摘要

Nonlinear magnetoelectric (ME) effects have been investigated in a multilayer of nickel zinc ferrite and lead zirconate titanate. The ME voltage has been measured under ac magnetic field amplitudes H of up to 1 kOe over the frequency range f= 1 mHz-1 Hz. Frequency doubling is observed for the ME voltage V generated across the multilayer and Fourier analysis of V shows harmonics of f. As H is increased or f is decreased, the shape of V is distorted and its magnitude decreases due to nonlinearity of the magnetostriction and the sample conductivity.