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This paper proposes an H-type magnetoelectric (ME) composite transducer structure consisting of a magnetostrictive Fe-Ni fork substrate and piezoelectric PZT plates. The fork composite structure has a higher ME voltage coefficient and a higher ME power output relative to other ME composite structures due to its higher quality (Q) factor. The ME sensitivity of the fork structure reaches 11 V/Oe. The...
The magneto-mechanical damping (MMD) in Terfenol-D is investigated by measuring the resonance vibration spectra of Terfenol-D bar. It is observed that MMD in Terfenol-D strongly depends on DC magnetic field (Hdc), and the ratio of the maximum variation of MMD over Hdc to the MMD at zero bias field achieves ~255%. Taking advantage of this MMD dependence on Hdc, a coil-less DC magnetic field sensor...
Magnetostrictive properties in a type of iron-nickel-based ferromagnetic alloy with constant elasticity (FeNi-FACE) are investigated. The results indicate that the strain coefficient at resonance achieves 865.70 nm/A due to the high effective mechanical quality factor (~3000) of the alloy. A magnetoelectric (ME) transducer with high effective mechanical quality factor is developed, which employs the...
The magnetoelectric (ME) effect of magnetostrictive Terfenol-D (Tb1-xDyxFe2-y) and piezoelectric Pb(Zr1-xTix)O3 plates bonded on a beryllium bronze substrate is reported. The substrate severs as frequency determining element and dominates the Q-factor of the oscillator. The device can be regard as a driven damped system. Its resonance occurs at multi-modes when the Terfenol-D plate oscillates at frequencies...
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