报告题目(中文)：交流极化频率对PMN-PT单晶铁电畴结构影响

报告题目(英文)：Domain Engineering Effect of Alternating Current Poling with Different Frequency on PMN-0.3PT Single Crystals

报告内容简介：The alternating current (electric field) poling (ACP) was applied on [001]-oriented 0.7Pb(Mg_1/3Nb_2/3)O₃- 0.3PbTiO₃(PMN-0.3PT) single crystal samples with dimensions of 5-mm-thick k₃₃mode and the influence of ACP frequency (f_ACP) was studied. Compared to those from traditional direct (electric field) poling (DCP) samples, d₃₃and ε^T₃₃/ε₀) of ACP samples could gain up to 67% increase to 3200 pC/N and 10500, respectively. In this work, low f_ACPis preferred for better enhancement. The ACP dynamics and the corresponding domain engineering effect during the saturation process were studied by both P-E loops and phase-field simulation.

报告人姓名：罗骋韬

报告人简介(中文)：弛豫铁电单晶的交流极化研究

报告人简介(英文)：对[001]取向的0.7Pb（Mg1/3Nb2/3）O3-0.3PbTiO3（PMN-0.3PT）单晶样品进行了交流（电场）极化（ACP），研究了ACP频率（fACP）的影响。与传统的直接（电场）极化（DCP）样品相比，d33和εT33型/ε0）时，可提高67%，分别达到3200pc/N和10500 。在这项工作中，低fACP是更好的增强首选。通过P-E环和相场模拟研究了ACP在饱和过程中的动力学行为及相应的畴工程效应。

报告人单位(中文)：上海交通大学

报告人单位(英文)：Shanghai Jiaotong University

报告时间：2021-05-26 09:30

报告地点：材料A楼 503室

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联系人：陈建国