Study of Geometry Modulated Magnetoelectric Composite Structure

The promising potential of Magneto-Electric (ME) composites in sensing and energy harvesting applications has sparked significant interest in both experimental and theoretical characterization because of its multiferroic nature. This work examines the position of the piezoelectric layer in an unsymmetrical tri-layer laminate ME composite. A coupling of three-dimensional structure of ME composite is modelled and investigated using finite element method. The proposed model incorporates the nonlinearity of magnetoelectric coupling and magnetostrictive material. The study investigates the characterisation of non-uniform magnetization distribution, strain, and magnetoelectric coefficient of the ME composite material. Additionally, a parametric study also performed with the aim of high ME coefficient by optimizing the length of the piezoelectric layer with respect to applied DC bias field. The results shows that the ME coefficient is increased when the piezoelectric layer is positioned in the middle of the tri-layer composite structure, rather than the spanning its entire length, leading to a noticeable reduction in material usage.