Torrent, M. C. (Maria Carme)Sagués i Mestre, FrancescArias, F.San Miguel Ruibal, Maximino2009-09-252009-09-2519881050-2947https://hdl.handle.net/2445/9428We study the Fréedericksz transition in a twist geometry under the effect of a periodic modulation of the magnitude of the applied magnetic field. We find a shift of the effective instability point and a time-periodic state with anomalously large orientational fluctuations. This time-periodic state occurs below threshold and it is accompanied by a dynamically stabilized spatial pattern. Beyond the instability the emergence of a transient pattern can be significantly delayed by a fast modulation, allowing the observation of pattern selection by slowing down the reorientational dynamics.9 p.application/pdfeng(c) The American Physical Society, 1988Cristalls líquidsTransformacions de faseLiquid crystalsPhase transformations (Statistical physics)info:eu-repo/semantics/article26756info:eu-repo/semantics/openAccess