论文标题
透明多晶体中的抗fiferroelectric Switch诱导的双折射$ pbzr_ {0.95} ti_ {0.05} o_ {3} $ film
Birefringence induced by antiferroelectric switching in transparent polycrystalline $PbZr_{0.95}Ti_{0.05}O_{3}$ film
论文作者
论文摘要
抗抗逆抗材料的最特征性功能特性是通过电场诱导从非极性到极相的相变。在这里，我们研究了该场诱导的相变对$ pbzr_ {0.95} ti_ {0.05} o_ {3} $的双重变化的效果。 We use a transparent polycrystalline $PbZr_{0.95}Ti_{0.05}O_{3}$ film grown on $PbTiO_{3}/HfO_{2}/SiO_{2}$ with interdigitated electrodes to directly investigate changes in birefringence in a simple transmission geometry.尽管膜的多晶性质及其中等厚度，但田间诱导的过渡仍会在极化显微镜下观察到可观的效果。发现该胶片的表现就像是一种均匀的双重媒介。该场诱导的双折射的时间演变提供了有关反抗逆转开关过程中不可逆性及其缓慢动力学的信息。双折射的变化有两个主要贡献，一种响应速度（〜0.5 s），一个较慢的贡献在长达30分钟的时间内升高和饱和。讨论了这个长期饱和度和放松时间的可能起源。
The most characteristic functional property of antiferroelectric materials is the possibility to induce a phase transition from a non-polar to a polar phase by an electric field. Here, we investigate the effect of this field-induced phase transition on the birefringence change of $PbZr_{0.95}Ti_{0.05}O_{3}$. We use a transparent polycrystalline $PbZr_{0.95}Ti_{0.05}O_{3}$ film grown on $PbTiO_{3}/HfO_{2}/SiO_{2}$ with interdigitated electrodes to directly investigate changes in birefringence in a simple transmission geometry. In spite of the polycrystalline nature of the film and its moderate thickness, the field-induced transition produces a sizeable effect observable under a polarized microscope. The film in its polar phase is found to behave like a homogeneous birefringent medium. The time evolution of this field-induced birefringence provides information about irreversibilities in the antiferroelectric switching process and its slow dynamics. The change in birefringence has two main contributions, one that responds briskly (~ 0.5 s), and a slower one that rises and saturates over a period of as long as 30 minutes. Possible origins for this long saturation and relaxation times are discussed.
