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Shear-mode magnetostrictive/piezoelectric composite with an enhanced magnetoelectric coefficient
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Image of FIG. 1.
FIG. 1.

(a) Schematic diagram of the proposed shear mode three-phase magnetostrictive/piezoelectric/brass heterostructure. (b) The coordinate system shows the crystalline directions of the PMN-PT single crystal. (c) and (d) illustrate the motion of the PMN-PT single crystal under shear extensional and longitudinal extensional stresses, respectively. The arrows P and T i (i = 3 and 5) denote the polarization and stress directions. The Terfenol-D layer in the heterostructure has two functions: the end part (bonded to PMN-PT) generates a longitudinal extensional stress T 3, and the center part (unbounded to PMN-PT) produces a shear extensional stress T 5.

Image of FIG. 2.
FIG. 2.

ME coefficient α E as a function of dc magnetic bias H dc for a shear-mode Terfenol-D/PMN-PT laminate composite. The points denote the values of α E for the L-L mode, L-T mode, and push-pull mode Terfenol-D/PMN-PT laminate composites (see Refs. 7–9).

Image of FIG. 3.
FIG. 3.

Time-domain waveforms of (a) applied ac magnetic field H ac and ME output voltage V ME for (b) the shear mode Terfenol-D/PMN-PT laminates and (c) a one-sided longitudinal-extensional laminate. The inset shows the photos of the shear-mode and one-side longitudinal-mode laminate composites.


Generic image for table
Table I.

Constituent material parameters of PMN-PT for transverse-extensional, longitudinal-extensional, and shear modes.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Shear-mode magnetostrictive/piezoelectric composite with an enhanced magnetoelectric coefficient