Abstract
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 FeNi-FACE and piezoelectric Pb(Zr,Ti)O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> (PZT8) material. The transducer is designed to operate as a half-wavelength (λ/2), longitudinal resonator. Resonance of the transducer occurs at the frequency of 29.9674 kHz, and the resonant ME voltage coefficient achieves 35.707V/Oe (i.e., 446.338 V/cm Oe) with an effective mechanical quality factor of 1450. The ME output power density at optimal load resistance of 35kΩ arrives 0.989mW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> under 0.3Oe root-mean-square AC magnetic field. The performances indicate that the ME transducer is promising for ME energy conversion application.
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