Ferroelectric Domain Walls: Statics, Dynamics, and by Jill Guyonnet

By Jill Guyonnet

utilizing the nano metric solution of atomic strength microscopy suggestions, this paintings explores the wealthy primary physics and novel functionalities of area partitions in ferroelectric fabrics, the nano scale interfaces keeping apart areas of another way orientated spontaneous polarization. a result of neighborhood symmetry-breaking attributable to the swap in polarization, area partitions are chanced on to own an unforeseen lateral piezoelectric reaction, even if this is often symmetry-forbidden within the mum or dad fabric. This has fascinating power functions in electromechanical units in accordance with ferroelectric area patterning. furthermore, electric conduction is proven to come up at area partitions in in a different way insulating lead zirconate titanate, the 1st such remark outdoors of multiferroic bismuth ferrite, as a result of the tendency of the partitions to localize defects. The position of defects is then explored within the theoretical framework of disordered elastic interfaces owning a attribute roughness scaling and complicated dynamic reaction. it truly is proven that the heterogeneous illness panorama in ferroelectric skinny motion pictures results in a breakdown of the standard self-affine roughness, probably on the topic of powerful pinning at person defects. eventually, the jobs of various environmental stipulations and disorder densities in area switching are explored and proven to be appropriately modelled as a contest among screening results and pinning.

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