非均匀多铁性杆的磁电耦合效应

We analyze the magnetoelectric effect of non-uniform multiferroic composite nanofibers composed of both piezoelectric and piezomagnetic phases. The non-uniformity could be induced by the manufacturing error and may have an influence on the magnetoelectric effect. The governing equation is formulated based on the zero-order beam theory, and the state space method is used to compute the magnetoelectric coefficient. Numerical examples are presented for a non-uniform composite nanofiber with different non-uniformity parameters and boundary conditions. The results show that the non-uniformity of the cross-section may increase the magnetoelectric effect, and thus provides a simple and also attracting way for the design of high-performance magnetoelectric structures.