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A phenomenological approach to magneto-optical bistability in magnetic fields

V. Sofonea

Research Center for Hydrodynamics, Cavitation and Magnetic Fluids, Technical University of Timisoara, Bd. Viteazul 1, R - 1900 Timisoara, Romania.

Static and dynamics operation modes of a hybrid magneto-optical device containing a magnetic fluid sample and a feedback loop have been analysed. Numerical experiments based on real experiment data about the magneto-optical birefringence effect in magnetic fluid thin layers revealed a bistable behaviour in the static conditions at reasonable values of experimental parameters. When pulsed magnetic field was applied to affect the device in dynamic conditions, besides the switching-on operation of the device, a critical slowing-down effect has been observed. A phenomenological Ginsburg-Landau model has been employed to explain all above processes occuring in the device. Figs 6, refs 16.

Magnitnaya Gidrodinamika 30, No. 1, 11-19, 1994 [PDF, 0.46 Mb] (in Russian)
Magnetohydrodynamics 30, No. 1, 8-14, 1994 [PDF, 0.40 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X