Probing ferroelectricity with synchrotron light
讲座名称：
Probing ferroelectricity with synchrotron light
讲座时间：
2017-06-15
讲座人：
Dmitry Chernyshov
形式：
校区：
兴庆校区
实践学分：
讲座内容：
报告题目：Probing ferroelectricity with synchrotron light
报告地点：地点：曲江校区西六楼409会议室
报告时间：6月15日上午10点
报告摘要：
Deliberate manipulation of a ferroelectric response requires a detailed description of various processes occurring in a crystal and evaluation of their contributions to piezoelectric constants and field-induced strains. Single crystals of many ferroelectric perovskites frequently show an enhanced electromechanical response as compared with ceramics materials of the same composition. The enhancement is linked to a structural inhomogeneity at different length scales and to a domain structure forming over an inhomogeneous state. Here I show how in-situ diffraction experiments with synchrotron light contribute in the coherent picture of the structural evolution at different length and time scales. I will focus on lead-based perovskite-like materials and discuss relaxor, antiferroelectric and ferroelectric behavior based on the characteristic diffraction signatures as a function of electric field and temperature.
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