Study of the structure factor anisotropy and long range correlations of ferrofluids in the dilute low-coupling regime / Cerdà J.J., Elfimova E., Ballenegger V., Krutikova E., Ivanov A., Holm C. // Journal of Magnetism and Magnetic Materials. - 2011. - V. 323, l. 10. - P. 1246-1253.

ISSN:

03048853

Type:

Conference Paper

Abstract:

Dipolar soft-sphere (DSS) fluids in the dilute low-coupling regime are studied via Molecular Dynamic simulations and the extension of a theoretical formalism previously used for dipolar hard spheres in which new terms for the virial expansion of the radial distribution function corresponding to the three-particle contribution are presented and tested for the zero and non-zero magnetic field case. A thorough comparison with simulations shows that the extended formalism is able to account for the structure factors of DSS with and without externally applied magnetic fields in the dilute low-coupling regime: quantitative agreement between theory and simulations is found for dipolar coupling parameters λ≲2, and volume fraction φ≲0.25. When λ>1 the new added term to the virial expansion is observed to play a crucial role in order to match quantitatively theory and simulations at zero field. In the presence of an external magnetic field our tests show that further improvements are needed and only new terms with Langevin function dependences can significatively contribute to improve the predictions for the dilute low-coupling regime. Numerical simulations show that despite that the ferrofluids considered here are in the dilute low-coupling regime, when an external field is applied, important correlations along the parallel direction to the field and depletion phenomena along the perpendicular direction are observed in the averaged density surrounding a particle. © 2010 Elsevier B.V. All rights reserved.

Author keywords:

Dipolar soft-sphere fluid; Ferrofluid; Molecular dynamics simulation; Structure factor; Theory

Index keywords:

Dipolar soft-sphere fluid; Ferrofluid; Molecular dynamics simulations; Structure factor; Theory; Amorphous alloys; Computer simulation; Distribution functions; Magnetic fields; Magnetic fluids; Metall

DOI:

10.1016/j.jmmm.2010.11.015

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952186181&doi=10.1016%2fj.jmmm.2010.11.015&partnerID=40&md5=c6fcc394cae438dc74734c70f82dac97

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952186181&doi=10.1016%2fj.jmmm.2010.11.015&partnerID=40&md5=c6fcc394cae438dc74734c70f82dac97
Affiliations	Instituto de Fsica Interdisciplinar y Sistemas Complejos IFISC (CSIC-UIB), Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain; Institute for Computational Physics, Universitát Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany; Department of Mathematical Physics, Urals State University, 51 Lenin Avenue, Ekaterinburg 620083, Russian Federation; Institut UTINAM, Universit de Franche-Comt, Route de Gray 16, 25030 Besancon, France
Author Keywords	Dipolar soft-sphere fluid; Ferrofluid; Molecular dynamics simulation; Structure factor; Theory
References	Odenbach, S., Ferrofluids, Magnetically Controllable Fluids and their Applications (2002) Lecture Notes in Physics, , Springer New York; Holm, C.C., Weis, J.J., (2005) Curr. Opin. Colloid Interface Sci., 10, p. 133; Odenbach, S., (2003) Coll. Surf. A: Physicochem. Eng. Aspects, 217, p. 171; Shliomis, M.I., (1974) Sov. Phys. Usp., 153, p. 17; Tsebers, A., (1982) Magnetohydrodynamics (N.Y.), 18, p. 345; Pshenichnikov, A.F., Mekhonoshin, V.V., Lebedev, A.V., (1996) J. Magn. Magn. Mater., 161, p. 94; Wertheim, M.S., (1971) J. Chem. Phys., 55, p. 4291; Morozov, K.I., (1987) Bull. Acad. Sci. USSR, Phys. Ser. (Engl. Transl.), 51, p. 32; Morozov, K.I., Lebedev, A.V., (1989) J. Magn. Magn. Mater., 85, p. 51; Rusbroo, G.S., Stell, G., Hoye, J.S., (1973) Mol. Phys., 26, p. 1199; Wagner, J., Fischer, B., Autenrieth, T., (2006) J. Chem. Phys., 124, p. 114901; Szalai, I., Dietrich, S., (2008) J. Phys. Condens. Matter, 20, p. 204122; Buyevich, Y.A., Ivanov, A.O., (1992) Physica A, 190, p. 276; Ivanov, A.O., (1992) Magnetohydrodynamics (N.Y.), 28, p. 39; Gazeau, F., Dubois, E., Bacri, J.C., Boue, F., Cebers, A., Perzynski, R., (2002) Phys. Rev. e, 65, p. 031403; Wagner, J., Fischer, B., Autenrieth, T., Hempelmann, R., (2006) J. Phys. Condens. Matter, 18, p. 2697; Wiedenmann, A., Kammel, M., Heinemann, A., Keiderking, U., (2006) J. Phys. Condens. Matter, 18, p. 2713; Pop, L.M., Odenbach, S., (2006) J. Phys. Condens. Matter, 18, p. 2785; Elfimova, E., Ivanov, A., (2008) Magnetohydrodynamics, 44, p. 39; Weeks, J.D., Chandler, D., Andersen, H.C., (1971) J. Chem. Phys., 54, p. 5237; Balescu, R., (1975) Equilibrium and Nonequilibrium Statistical Mechanics, , Wiley New York; Wertheim, M.S., (1963) Phys. Rev. Lett., 10, p. 321; Chaang, J., Sandler, S.I., (1994) Mol. Phys., 735, p. 81; Nijboer, B.R.A., Van Hove, L., (1952) Phys. Rev., 85, p. 777; Ivanov, A.O., Kuznetsova, O.B., (2001) Phys. Rev. e, 64, p. 041405; Limbach, H.J., Arnold, A., Mann, B.A., Holm, C., (2006) Comput. Phys. Commun., 174, p. 704; Cerd, J.J., Ballenegger, V., Lenz, O., Holm, C., (2008) J. Chem. Phys., 129, p. 234104; Allen, M.P., Tildesley, D.J., (1987) Computer Simulation of Liquids, , Clarendon Press Oxford; Huang, J.P., Wang, Z.W., Holm, C., (2005) Phys. Rev. e, 71, p. 061203; Cerd, J.J., Elfimova, E., Ballenegger, V., Krutikova, E., Ivanov, A., Holm, C., (2010) Phys. Rev. e, 81, p. 011501; Mriguet, G., Jardat, M., Turq, P., (2004) J. Chem. Phys., 121, p. 6078; Pyanzina, E., Kantorovich, S.S., Cerd, J.J., Ivanov, A., Holm, C., (2009) Mol. Phys., 107, p. 571; Ciftja, O., (2009) Solid State Commun., 149, p. 532
Correspondence Address	Cerdà, J. J.; Instituto de Fsica Interdisciplinar y Sistemas Complejos IFISC (CSIC-UIB), Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain; email: joan@ifisc.uib-csic.es
CODEN	JMMMD
Language of Original Document	English
Abbreviated Source Title	J Magn Magn Mater
Source	Scopus