But the materials worked only at cryogenic temperatures, which are impractical for real-world use. Ferroelectrics, found in ultrasound imaging equipment and computer memory, are prized for their ability to flip polarization when exposed to an external electric field. Because the materials are currently made of inorganic compounds such as barium titanate, researchers have been seeking alternatives that are cheaper, lighter, and easier to fabricate.
by Lauren K. Wolf |
August 23, 2012