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Analysis of the spatial distribution of magneto-optic properties of gamma -Fe2O3 ferrofluid using different polarimetric criteria

The spatial distribution of the birefringence of a gamma -Fe2O3 ferrofluid sample, submitted to a constant magnetic field, has been analysed by means of different polarimetric criteria, evaluated from the mij coefficients of the Mueller matrix. These criteria introduced by different authors are used to control the validity and the quality of our calculus method for the determination of the birefringence spatial distribution. Results are compared with the phase-delay spatial distribution of a nematic liquid crystal cell obtained by the same method.