%A DING Jian-ming, JIANG Qing, ZHONG Chong-gui
%T Influence of the stress on magnetoelectric effect in magnetostrictive-PZT bilayers
%0 Journal Article
%D 2007
%J Front. Phys.
%J Frontiers of Physics
%@ 2095-0462
%R 10.1007/s11467-007-0041-4
%P 312-317
%V 2
%N 3
%U {https://journal.hep.com.cn/fop/EN/10.1007/s11467-007-0041-4
%8 2007-09-05
%X In this letter, we investigate the influence of the stress on magnetoelectric (ME) effect in a magnetostrictive-PZT bilayer. ME voltage coefficient α*E =δEδH?????, where δE is the induced electric field for an applied alternating current (ac) magnetic field δH, is obtained by solving the stress-related piezoelectric constitutive equation and the conventional magnetostrictive equation with appropriate boundary condition. Based on the free-energy density function of the PZT film in stress state, we get the stress-related piezoelectric charge coefficient pd*31 and dielectric permittivity pε*33. After taking the cobalt ferrite (CFO) as magnetostrictive phase, it is found that α*E increases with decreasing 2-d compressive stress for CFO-PZT, which not only is qualitatively consistent with previous experimental measurements, but also provides a possible route to improve the ME effect.