A quasistatic theoretical model including shear lag and demagnetizing effects is presented for predicting the magneto-electric (M-E) effects in an M-E laminate composite consisting of magnetostrictive and piezoelectric phases. Analytical solutions for strain distributions and effective M-E voltage coefficients $\overline{\alpha }$ are derived. Parametric studies are presented to evaluate the influences of material properties and geometries on strain distribution and $\overline{\alpha }$. Analytical data indicate that shear lag and demagnetization strongly influence strain distribution, and these effects cannot be ignored in predicting $\overline{\alpha }$ for most M-E laminate composites. Analytical results are also compared to experimental test data with excellent correlation for both strain distribution and $\overline{\alpha }$, i.e., less than 5% variations.

• Received 31 May 2007

DOI:https://doi.org/10.1103/PhysRevB.76.134116