The effects of polydispersity on the initial susceptibilities of ferrofluids / Camp P.J., Elfimova E.A., Ivanov A.O. // Journal of Physics Condensed Matter. - 2014. - V. 26, l. 45.

ISSN:

09538984

Type:

Article

Abstract:

The effects of particle-size polydispersity on the initial susceptibilities of concentrated ferrofluids are analyzed using a combination of theory and computer simulation. The study is focused on a model ferrofluid with a prescribed magnetic-core diameter distribution, a fixed non-magnetic surface layer (corresponding to a demagnetized layer and adsorbed surfactant) and a combination of dipolar and hard-core interactions. The non-trivial effects of polydispersity are identified by comparing the initial susceptibilities of monodisperse and polydisperse ferrofluids with the same Langevin susceptibility. The theory is based on a correction to the second-order modified mean-field theory arising from a formal Mayer-type cluster expansion; this correction is dependent on a parameter similar to the normal dipolar coupling constant, except that it contains a complicated double average over the particle-size distribution, which means that the initial susceptibility should depend significantly on polydispersity. Specifically, the theory predicts that the initial susceptibility is enhanced significantly by polydispersity. This prediction is tested rigorously against results from Monte Carlo simulations and is found to be robust. The qualitative agreement between theory and simulation is already satisfactory, but the quantitative agreement could be improved by a systematic extension of the cluster expansion. The overall conclusion is that polydispersity should be accounted for carefully in magnetogranulometric analyses of real ferrofluids. © 2014 IOP Publishing Ltd.

Author keywords:

ferrofluids; magnetic susceptibility; polydispersity; simulation; theory

Index keywords:

Magnetic susceptibility; Polydispersity; Initial susceptibility; simulation; theory; Magnetic fluids

DOI:

10.1088/0953-8984/26/45/456002

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908293075&doi=10.1088%2f0953-8984%2f26%2f45%2f456002&partnerID=40&md5=6ece9af437f6bfaec1204d698a674a81

Соавторы в МНС:

—

Другие поля

Поле	Значение
Art. No.	456002
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908293075&doi=10.1088%2f0953-8984%2f26%2f45%2f456002&partnerID=40&md5=6ece9af437f6bfaec1204d698a674a81
Affiliations	School of Chemistry, University of Edinburgh, David Brewster Road, Edinburgh, United Kingdom; Institute of Mathematics and Computer Sciences, Ural Federal University, 51 Lenin Avenue, Ekaterinburg, Russian Federation
Author Keywords	ferrofluids; magnetic susceptibility; polydispersity; simulation; theory
References	Rosensweig, R.E., (1998) Ferrohydrodynamics, , New York: Dover; Laurent, S., Forge, D., Port, M., Roch, A., Robic, C., Vander Elst, L., Muller, R.N., (2008) Chem. Rev., 108, pp. 2064-2110; Langevin, P., (1905) J. Phys. Theor. Appl., 4, pp. 678-693; Weiss, P., (1907) J. Phys. Theor. Appl., 6, pp. 661-690; Tsebers, A., (1982) Magnetohydrodynamics, 18, pp. 137-142; Wertheim, M.S., (1971) J. Chem. Phys., 55, pp. 4291-4298; Morozov, K.I., Lebedev, A.V., (1990) J. Mag. Mag. Mater., 85, pp. 51-53; Buyevich, Y.A., Ivanov, A.O., (1992) Physica a, 190, pp. 276-294; Ivanov, A.O., (1992) Magnetohydrodynamics, 28, pp. 353-359; Pshenichnikov, A.F., Mekhonoshin, V.V., Lebedev, A.V., (1996) J. Mag. Mag. Mater., 161, pp. 94-102; Ivanov, A.O., Kuznetsova, O.B., (2001) Phys. Rev. E, 64, p. 041405; Huke, B., Lücke, M., (2000) Phys. Rev. E, 62, pp. 6875-6890; Huke, B., Lücke, M., (2003) Phys. Rev. E, 67, p. 051403; Huke, B., Lücke, M., (2004) Rep. Prog. Phys., 67, pp. 1731-1768; Szalai, I., Dietrich, S., (2008) J. Phys.: Condens. Matter, 20, p. 204122; Szalai, I., Dietrich, S., (2011) J. Phys.: Condens. Matter, 23, p. 326004; Szalai, I., Nagy, S., Dietrich, S., (2013) J. Phys.: Condens. Matter, 25, p. 465108; Ivanov, A.O., Kantorovich, S.S., Reznikov, E.N., Holm, C., Pshenichnikov, A.F., Lebedev, A.V., Chremos, A., Camp, P.J., (2007) Phys. Rev. E, 75, p. 061405; Ivanov, A.O., Kantorovich, S.S., Reznikov, E.N., Holm, C., Pshenichnikov, A.F., Lebedev, A.V., Chremos, A., Camp, P.J., (2007) Magnetohydrodynamics, 43, pp. 393-400; Wang, Z., Holm, C., (2003) Phys. Rev. E, 68, p. 041401; Levesque, D., Weis, J.J., (1994) Phys.Rev. E, 49, pp. 5131-5140; Klokkenburg, M., Dullens, R.P.A., Kegel, W.K., Erné, B.H., Philipse, A.P., (2006) Phys. Rev. Lett., 96, p. 037203; Rovigatti, L., Russo, J., Sciortino, F., (2012) Soft Matter, 8, pp. 6310-6319; Kantorovich, S., Ivanov, A.O., Rovigatti, L., Tavares, J.M., Sciortino, F., (2013) Phys. Rev. Lett., 110, p. 148306; Mendelev, V.S., Ivanov, A.O., (2004) Phys. Rev. E, 70, p. 051502; Ivanov, A.O., Kantorovich, S.S., Mendelev, V.S., Pyanzina, E.S., (2006) J. Mag. Mag. Mater., 300, pp. e206-e209; Klokkenburg, M., Erné, B.H., Meeldijk, J.D., Wiedenmann, A., Petushkov, A.V., Dullens, R.P.A., Philipse, A.P., (2006) Phys. Rev. Lett., 97, p. 185702; Castro, L.L., Gonc¸alves, G.R.R., Skeff Neto, K., Morais, P.C., Bakuzis, A.F., Miotto, R., (2008) Phys. Rev. E, 78, p. 061507; Eloi, M.T.A., Santos, J.L., Jr., Morais, P.C., Bakuzis, A.F., (2010) Phys. Rev. E, 82, p. 021407; Pshenichnikov, A.F., Lebedev, A.V., (2004) J. Chem. Phys., 121, pp. 5455-5467; Pshenichnikov, A.F., Lebedev, A.V., (2005) Colloid J., 67, pp. 189-200; Lebedev, A.V., (2010) Colloid J., 72, pp. 815-819; Ivanov, A.O., Elfimova, E.A., (2014) J. Mag. Mag. Mater., 374, pp. 327-332; Sturges, H.A., (1926) J. Am. Stat. Assoc., 21, pp. 65-66; Lebedev, A.V., (2013) Colloid J., 75, pp. 386-390; Allen, M.P., Tildesley, D.J., (1987) Computer Simulation of Liquids, , Oxford: Clarendon; Elfimova, E., Ivanov, A., (2008) Magnetohydrodynamics, 44, pp. 39-44; Elfimova, E.A., Ivanov, A.O., (2010) J. Exp. Theor. Phys., 111, pp. 146-156
Correspondence Address	Camp, P.J.; School of Chemistry, University of Edinburgh, David Brewster Road, United Kingdom
Publisher	Institute of Physics Publishing
CODEN	JCOME
Language of Original Document	English
Abbreviated Source Title	J Phys Condens Matter
Source	Scopus