“Elastic properties” of magnetic fluids

The results of Mössbauer investigations of the viscous magnetic liquids at temperatures of 100–300 K are discussed. The investigated ferrofluids were the colloidal dispersions of magnetite particles with average diameters of 7.5 and 10 nm in silicone carrier fluid. Supposing that the intensity of th...

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Published in:Journal of applied physics 1999-07, Vol.86 (1), p.576-577
Main Authors: Nikolaev, V. I., Shipilin, A. M., Shkolnicov, E. N., Zaharova, I. N.
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Language:English
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description The results of Mössbauer investigations of the viscous magnetic liquids at temperatures of 100–300 K are discussed. The investigated ferrofluids were the colloidal dispersions of magnetite particles with average diameters of 7.5 and 10 nm in silicone carrier fluid. Supposing that the intensity of the Mössbauer line is determined by the factor f=f′⋅f″ (f′ is Mössbauer factor for magnetite powder; f″ is a similar factor depending on oscillations of particles in a liquid), we estimated the values of the factor f″(T) at various temperatures. To describe the dependence f′(T), the Debye approximation was used. By means of the data on the dependence f″(T) the estimations of frequencies of particles oscillations Ω and “elasticity modulus” E of the investigated substances were obtained.
doi_str_mv 10.1063/1.370768
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