Orientation and twins separation in a micellar cubic crystal under oscillating shear

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Abstract
A series of experiments has been performed in order to analyze the shear orientation effect on a micellar cubic phase using small-angle x-ray-scattering techniques. In a Couette cell, an oscillating shear of strain amplitude less than unity was applied to the crystal. Using a x-ray synchrotron beam, the reciprocal planes perpendicular to the flow velocity and velocity gradient, respectively, were probed. Length and angle correlations were well characterized in both planes and full separation of twinned fcc single crystals was evidenced in some cases, each of them being coherent at millimeter scale.