Abstract
The magnetoelectric samples studied were made up of Terfenol-D, Pb(Zr,Ti)O3 and nonmagnetic flakes. The magnetic-mechanical-electric transform originating from the magnetostrictive effect of Terfenol-D caused the magnetoelectric coupling. The measured results indicated a strong dependence of the magnetoelectric voltage coefficient (αv) on the DC bias magnetic field (Hdc). One or two peaks could be observed in the αv-Hdc curve at a resonance frequency, which was attributed to two piezomagnetic coefficient components for Terfenol-D. The dependence of the peak voltage on Hdc was investigated, indicating that the piezomagnetic coefficient was the cause. By taking advantage of these performances, this paper used magnetoelectric materials to make the sensor for low AC magnetic field detection.
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