論文發表人：張家銘 (加州大學洛杉磯分校機械曁航太工程研究所博士班)

http://spie.org/Conferences/Programs/07/ss/conferences/index.cfm?fuseaction=6526

利用理論預測與實驗驗證並行的方式，成功預測了磁電層狀複合系統之磁電耦合效應。本研究包含了六種不同配置磁電層狀複合系統，其中包括了二維及一維的幾何形狀以及縱向、橫向、平面向的初始磁化和極化方向。在利用等效磁電參數a量化了各個配置的磁電耦合效應後，我們發展了一個涵蓋了全範圍磁致材料的compliance、poisson's ratio、以及piezomagnetic coefficient ratio等材料性質的萬用排序空間圖。此外，磁電耦合效應實驗也印證了此理論模型的準確性。實驗包含了磁致材料的材料基本測試以及磁電層狀複合系統的應變和等效磁電參數a。結果證實了理論預測不僅在實驗應變分佈得到與實驗完美的吻合，在等效磁電參數a的比較上，理論曲線也成功地預測實驗結果。因此，藉由此研究成果，所有磁電層狀複合系統的效能皆可藉由這個空間圖加以預測。

A theoretical modeling and experiment effort have been performed to verify the magnetoelectric (M-E) coupling effect in magnetostrictive-piezoelectric layered composites (MPLC) system. Six MPLC configurations are analytically modeled, including three field orientations, longitudinal, transverse, and in-plane, in both 1-D and 2-D plane geometries. By determining the individual effects of configurations and material properties through modeling, a 3-D sequencing map covering the span of compliance, Poisson's ratio, and piezomagnetic coefficient ratio of the magnetostrictive phases is developed to predict the homogenized M-E voltage coefficient, , curves. To confirm the accuracy of the models, several MPLC systems have been fabricated and tested. The results show good consistence for strain values and compatible trend for curves. By testing different MPLC system, the ordering of homogenized magnetoelectric voltage coefficient of each configuration follows the 3-D sequencing map.