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Nanodomains in Ferroelectrics and Magnetoelectrics

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I will present a review of recent theory and experiment concerning nanodomains. For many years domains in ferroelectrics were thought to be rectilinear, with for example, 180 and 90 degree domains in tetragonal crystals, 109 and 71 degree domains in rhombohedral crystals. Recently, however, experiments have revealed circular closure or vortex domains and toroidal domains (see attached figure). A brief history, starting with Ginzburg in 1984 and concluding with work this month by Igor Lukyanchuk (Amiens) and the present author will be given.

This talk is part of the Quantum Matter Seminar series.

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