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Measured frequency dependence of magnetoelectric (ME) voltage generated by a Ni-PZT resonator for a tangential bias field parallel to an ac magnetic field of amplitude . The peaks in are observed at and that are identified as bending modes and at due to radial acoustic mode. The inset shows the shape of the low-frequency resonance at on an expanded scale.
Thickness dependence of (a) frequencies for bending and radial oscillation modes and (b) magnitudes of ME voltages at resonance for a Ni-PZT resonator. The thicknesses of Ni of PZT are 0.2 and , respectively. The symbols are measured values. The lines in (a) are theoretical values and in (b) are guide to the eye.
Magnitudes of ME voltages generated as functions of dc bias magnetic field for in a Ni-PZT resonator. The thicknesses of Ni of PZT are 0.2 and , respectively. Curves and are for tangentially magnetized resonator at frequencies and . Curve is for perpendicularly magnetized resonator at the frequency .
Magnetic field dependence of magnetostriction for Ni. and are magnetostrictions measured parallel and perpendicular to , respectively, for the bias field parallel to the sample plane. is the magnetostriction measured in the plane of the sample for perpendicular to the sample plane.
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