Influence of structure configuration of magnetoelectric composites on magnetoelectric coefficient
LI Chunjian1, ZHOU Yong1,2*, PAN Yurong1, JIAO Donghong3
(1 School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China; 2 Jiangsu Technology Engineering Center of Meteorological Sensor Network,Nanjing 210044,Jiangsu, China; 3 School of Electric Power, North China University of Water Resources and Hydropower, Zhengzhou 450045, Henan, China)
Abstract:
Based on the constitutive equations of piezoelectric effect and magnetostrictive effect, the magnetoelectric responses of magnetostrictive/piezoelectric/magnetostrictive laminated composites were studied with finite element method for four different shapes including rectangular, semi-circle, convex semicircle and trapezoid. The magnetoelectric properties were analyzed for each of them.The results show that the output voltage is the largest of all for the semicircular end shape, which reaches 76.25 V with 1 000 Oe applied magnetic field.In frequency domain, the resonance frequency is 76.5 kHz for convex semicircle end shape,which is the lowest compared with other structures.It is also found that the magnetoelectric coefficient of the composite with trapezoidal end shape is the largest at frequency of 1 kHz, which is 7.63 V/（Oe·cm）, and 126.34 V/（Oe·cm） at resonance.Finally, the influences on magnetoelectric coefficients of semi-circle structurecomposites were analyzedfor different stacking sequences of magnetoelectric and piezoelectric layer. The results show that the maximum magnetoelectric coefficient 5.48 V/（Oe·cm）is obtained with PTN stacked sequence, while TPN stacked sequential magnetoelectric composites produces the smallestmagnetoelectric coefficient, which is 1.64 V/（Oe·cm）.
KeyWords:
laminated structure; magnetoelectric effect; piezoelectric effect; finite element; magnetoelectric coefficient
