435 research outputs found
Frequency Dependence of Magnetoelectric Interactions in Layered Structures of Ferromagnetic Alloys and Piezoelectric Oxides
Magnetoelectric (ME) interactions in layered structures of magnetostrictive
and piezoelectric phases are mediated by mechanical deformation. Here we
discuss the frequency dependence of ME coupling in bilayers and trilayers of
Permendur, a ferromagnetic alloy, and lead zirconate titanate. Data on ME
voltage coefficient versus frequency profiles reveal a giant ME coupling at
electromechanical resonance. The maximum voltage coefficient of 90 V/cm Oe is
three orders of magnitude higher than low-frequency values. The ME interactions
for transverse fields is an order of magnitude stronger than for longitudinal
fields. These results are in agreement with theory. The resonance ME effect,
therefore, is a novel tool for enhancing the magnetic-to-electric field
conversion efficiency in the composites.Comment: accepted for publication as rapid communication in Applied Physics
Magnetoelectric Effect in Ni-PZT-Ni Cylindrical Layered Composite Synthesized by Electro-deposition
The magnetoelectric (ME) coupling of cylindrical trilayered composite was
studied in this paper. The Ni-lead zirconate titanate (PZT)-Ni trilayered
cylindrical composite was synthesized by electro-deposition. The maximum ME
voltage coefficient of cylindrical ME composite is 35V/cm Oe, about three times
higher than that of the plate trilayered composite with the same raw materials
and magnetostrictive- piezoelectric phase thickness ratio. The high ME voltage
coefficient of cylindrical composite owes to the self-bound effect of circle.
Moreover, the resulting complex condition can induce a double peak in the field
dependence of ME coefficient.Comment: 11 pages, 5 figure
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