Possible Mechanism for Enormous Electromechanical Response

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Schematic diagrams of the different polarization directions (marked by arrows) in the relaxor perovskite structure. (A) Polarizations along T and R. (B) The MA phase for which the polarization lies in the (110) plane can be obtained by combining T an ...
Schematic diagrams of the different polarization directions (marked by arrows) in the relaxor perovskite structure. (A) Polarizations along T and R. (B) The MA phase, for which the polarization lies in the (110) plane, can be obtained by combining T and O. (C) The MC phase, for which the polarization lies in the (100) plane, can also be obtained by combining T and O.

Scientists at the U.S. Department of Energy's Brookhaven National Laboratory and collaborators at Stony Brook University, Johns Hopkins University, and the National Institute of Standards and Technology have discovered that nanosized regions with local polarizations, or "electric dipoles," in a special class of otherwise disordered materials may underlie these materials' extreme electromechanical response to an external electric field or physical deformation.


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