Piezoelectric Crystal Video (VIDEO) Penn State This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Before the alignment of dipoles or polarization of a PMN-PT crystal using an electric field there are many tiny domains with polarization along different directions. As cycles of AC electric fields are applied to the crystal, the domains realign, becoming fewer and larger. After several AC cycles, the domains are large and in layers. Credit Bo Wang/Penn State Usage Restrictions non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.