CHARACTERIZATION METHOD OF FLEXOELECTRIC COEFFICIENT OF PIEZOELECTRICS AT NANOSCALE

摘要：

　　An analytical method for measuring the flexoelectric coupling coefficient at nanoscale based on nano-compression technique is proposed in this paper.The flexoelectric formula in the method is derived through the thermodynamic method with consideration of the piezoelectric influence and the flexoelectric coupling coefficient, which can be directly obtained by measuring the stiffness of the constant cross-section pillar and the variable cross-section pillar.Meanwhile, the size and shape effect of the variable cross-section on the stiffness reduction is analyzed by numerical methods to determine the guideline for the pillars designing, hence improve the accuracy of the flexoelectric coupling coefficient measurement.The proposed method achieves flexoelectric coupling coefficient measurement at nanoscale in a mechanical way without electric polarization or current measurement, which paves the path for the design and application of the flexoelectric nano devices.

关键词： Flexoelectricity Piezoelectricity Nano-compression Stiffness

作者: Di YAO Hao ZHOU Xue-yun WANG Jia-wang HONG

作者单位: School of Aerospace Engineering, Beijing Institute of Technology, Beijing, P.R.China, 100081 Beijing Institute of Spacecraft System Engineering, Beijing, P.R.China, 100094

会议类型: 国际会议

会议名称: The 2017 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2017全国压电和声波理论及器件技术研讨会)

会议地点: 成都

会议语种:英文

页码: 325-330

在线出版日期: 2017-10-27（万方平台首次上网日期，不代表论文的发表时间）