90-degree polarization switching in BaTiO3 crystals without domain wall motion
90-degree polarization switching in BaTiO3 crystals without domain wall motion
复制标题
BaTiO3 晶体中的 90 度偏振切换，无磁畴壁运动
DOI：
10.1063/1.4832784
复制
发表时间：
2013-12-02
影响因子：
4
通讯作者：
Li, F. X.
中科院分区：
文献类型：
--
作者：
Li, Y. W.;Scott, J. F.;Li, F. X.
我们通过压缩预制具有互锁域的样品，报告了没有域壁 (DW) 运动的 BaTiO3 晶体中的 90 度偏振切换。在去极化和老化晶体的电重新极化过程中，90度域成核仍然存在，但90度DW运动受到周围域的强约束的抑制，导致无DW的90度偏振切换。无 DW 90 度切换时测得的 500 V/mm 矫顽场接近固有值，并且远大于通过 90 度 DW 运动获得的 80 V/mm 的矫顽场。与超薄膜中相当困难的无畴180度偏振切换相比，90度无DW切换更容易。 (C) 2013 AIP 出版有限责任公司。
We report 90 degrees polarization switching in a BaTiO3 crystal without domain wall (DW) motion by prefabricating samples with interlocking domains via compression. During electric re-poling of the depoled and aged crystals, 90 degrees domain nucleation still exists, but 90 degrees DW motion is inhibited by the strong constraints from surrounding domains, leading to DW-free 90 degrees polarization switching. The measured coercive field of 500 V/mm for the DW-free 90 degrees switching is close to the intrinsic values and much larger than that of 80 V/mm via 90 degrees DW motion. Compared to the rather difficult domain-free 180 degrees polarization switching in ultrathin films, 90 degrees DW-free switching is easier. (C) 2013 AIP Publishing LLC.