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Article

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Published version

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1985

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/9404

Dynamics of Fréedericksz transition in a fluctuating magnetic field

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http://dx.doi.org/10.1103/PhysRevA.32.1843

Abstract

Fréedericksz transition under twist deformation in a nematic layer is discussed when the magnetic field has a random component. A dynamical model which includes the thermal fluctuations of the system is presented. The randomness of the field produces a shift of the instability point. Beyond this instability point the time constant characteristic of the approach to the stationary stable state decreases because of the field fluctuations. The opposite happens for fields smaller than the critical one. The decay time of an unstable state, calculated as a mean first-passage time, is also decreased by the field fluctuations.

Subject

Cristalls líquids, Fluctuacions (Física), Dinàmica de fluids

Subject (English)

Liquid crystals, Fluctuation phenomena

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Articles publicats en revistes (Ciència dels Materials i Química Física)

Citation

SAGUÉS I MESTRE, Francesc and SAN MIGUEL RUIBAL, Maximino. Dynamics of Fréedericksz transition in a fluctuating magnetic field. Physical Review A. 1985. Vol. 32, num. 3, pags. 1843-1851. ISSN 1050-2947. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/9404

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