Converse flexoelectric coefficient f1212 in bulk Ba0.67Sr0.33TiO3

Relationship between direct and converse flexoelectric coefficients

Converse flexoelectric effect in bent-core nematic liquid crystals.

We report on the converse flexoelectric effect in two bent-core nematic liquid crystals with opposite dielectric anisotropies. The results are based on electro-optic investigations of inplane field-driven distortions in homeotropic samples (the Helfrich method). They are interpreted by an extension of the Helfrich theory that takes into account the higher order distortions. The bend flexocoeffi...

Unipolar memristive Switching in Bulk Negative Temperature Coefficient Thermosensitive Ceramics

A memristive phenomenon was observed in macroscopic bulk negative temperature coefficient nickel monoxide (NiO) ceramic material. Current-voltage characteristics of memristors, pinched hysteretic loops were systematically observed in the Ag/NiO/Ag cell. A thermistor-based model for materials with negative temperature coefficient was proposed to explain the mechanism of the experimental phenomen...

Flexoelectric Effect in Solids

Piezoelectricity—the coupling between strain and electrical polarization, allowed 2 Zubko, Catalan, Tagantsev by symmetry in a restricted class of materials—is at the heart of many devices that permeate our daily life. Since its discovery in the 1880’s by Pierre and Jacques Curie, the piezoelectric effect has found use in everything from submarine sonars to cigarette lighters. By contrast, flex...

Nanomechanics of flexoelectric switching

J. Očenášek,1 H. Lu,2 C. W. Bark,3 C. B. Eom,3 J. Alcalá,4 G. Catalan,5,6 and A. Gruverman2 1New Technologies Research Centre, University of West Bohemia in Pilsen, 30614 Plzeň, Czech Republic 2Department of Physics and Astronomy, University of Nebraska-Lincoln, Nebraska 68588, USA 3Department of Materials Science and Engineering, University of Wisconsin-Madison, Wisconsin 53706, USA 4Departmen...