Abstract
It is shown that voltage self-sustained oscillations, which are determined by the properties of the near-electrode layer and electrohydrodynamic flows that are periodically formed in the colloid layer, emerge for a preset direct current at the electrodes of a plane-parallel cell filled with a colloid system consisting of stabilized magnetic nanoparticles dispersed in a weakly conducting liquid. The effect of self-sustained oscillations and periodic electrohydrodynamic flows in phase separation in the colloid system is analyzed. It is found that new dynamic formations are generated, which are regions of elevated concentration of magnetite particles having the shape of labyrinths of millimeter size. The emergence of a negative real part of the permittivity of the colloid layer is detected and attributed to the fact that the normal component of the internal electric field produced by volume charges becomes codirectional with the applied field when steady-state electrohydrodynamic flows appear in the system.
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References
M. Trau, S. Sankaran, D. A. Saville, and I. A. Aksay, Nature 374, 437 (1995).
M. Trau, D. A. Saville, and I. A. Aksay, Langmuir 13, 6375 (1997).
I. S. Aranson, D. Blair, and V. A. Kalatsky, et al., Phys. Rev. Lett. 84, 3306 (2000).
I. S. Aranson, B. Meerson, P. V. Sasorov, and V. M. Vinokur, Phys. Rev. Lett. 88, 204301 (2002).
I. S. Aranson and L. S. Tsimring, Rev. Mod. Phys. 78, 641 (2006).
M. V. Sapozhnikov, Y. V. Tolmachev, I. S. Aranson, and W. K. Kwok, Phys. Rev. Lett. 90, 14301 (2003).
I. S. Aranson and M. V. Sapozhnikov, Phys. Rev. Lett. 92, 234301 (2004).
M. V. Sapozhnikov, I. S. Aranson, W. K. Kwok, and Y. V. Tolmachev, Phys. Rev. Lett. 93, 084502 (2004).
A. Ramos, H. Morgan, N. G. Green, and A. Castellanos, J. Phys. D: Appl. Phys. 31, 2338 (1998).
N. G. Green and H. Morgan, J. Phys. D: Appl. Phys. 31, L25 (1998).
A. Castellanos, A. Ramos, A. Gonz’alez, et al., J. Phys. D: Appl. Phys. 36, 2584 (2003).
S.-R. Yeh, M. Seul, and B. I. Shraiman, Nature 386(6620), 57 (1997).
W. D. Ristenpart, I. A. Aksay, and D. A. Saville, Phys. Rev. E 69, 021405 (2004).
A. O. Ivanov, Colloid J. 59, 446 (1997).
Yu. I. Dikanskii and O. A. Nechaeva, Colloid J. 65, 305 (2003).
V. M. Kozhevnikov, I. Yu. Chuenkova, M. I. Danilov, et al., Magnetohydrodynamics 41, 53 (2005).
V. M. Kozhevnikov, I. Yu. Chuenkova, M. I. Danilov, and S. S. Yastrebov, Zh. Tekh. Fiz. 76(7), 129 (2006) [Tech. Phys. 51, 946 (2006)].
V. V. Chekanov, E. A. Bondarenko, and E. N. Diskaeva, Vestn. Stavropol’sk. Gos. Univ., No. 43, 85 (2005).
G. M. Gordeev, N. P. Matusevich, S. P. Rzhel’skaya, and V. E. Fertman, Physical Properties of Magnetic Liquids (UNTS AN SSSR, Sverdlovsk, 1983), p. 98 [in Russian].
Yu. I. Dikanskii, Magn. Gidrodin., No. 1, 123 (1984).
S. S. Dukhin and V. N. Shilov, Dielectric Phenomena and the Double Layer in Disperse Systems and Polyelectrolytes (Naukova Dumka, Kiev, 1972; Wiley, New York, 1974), Chap. 1, p. 20.
M. K. Bologa, F. P. Grosu, and I. A. Kozhukhar, Electroconvection and Heat Exchange (Shtiintsa, Kishinev, 1977), Chap. 1, pp. 20–169.
G. I. Skanavi, Physics of Insulators (Weak Fields) (GITTL, Moscow, 1949), p. 12 [in Russian].
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Original Russian Text © V.M. Kozhevnikov, I.Yu. Chuenkova, M.I. Danilov, S.S. Yastrebov, 2008, published in Zhurnal Tekhnicheskoĭ Fiziki, 2008, Vol. 78, No. 2, pp. 51–57.
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Kozhevnikov, V.M., Chuenkova, I.Y., Danilov, M.I. et al. Voltage self-sustained oscillation and phase separation dynamics in a thin layer of a weakly conducting ferromagnetic liquid with periodically emerging electrohydrodynamic flows. Tech. Phys. 53, 192–198 (2008). https://doi.org/10.1134/S1063784208020072
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DOI: https://doi.org/10.1134/S1063784208020072