%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*EEδH?????, 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.