Thermodynamic and magnetic properties of ferrofluids in external uniform magnetic field / Vtulkina E.D., Elfimova E.A. // Journal of Magnetism and Magnetic Materials. - 2017. - V. 431, l. . - P. 218-221.

ISSN:
03048853
Type:
Article
Abstract:
The work is devoted to the theoretical investigation of the thermodynamic and magnetic properties of ferrofluids in applied magnetic field. Analytical expressions for the second and the third virial coefficients of dipolar hard spheres model were obtained by using the least-squares approximation to the simulation data (Elfimova et al., 2013 [4]). The expressions for the virial coefficients are presented as functions of the dipolar coupling constant λ and the Langevin parameter α. The analytical formulas for the virial coefficients were incorporated in to so-called logarithmic free energy theory (Elfimova et al., 2012 [8]). This theory yields the Helmholtz free energy and the magnetization. The comparison between theory and computer simulation shows good agreement for λ⩽2.The analytical expression of the Helmholtz free energy was also used to obtain a sedimentation equilibrium concentration profile of ferroparticles subjected to uniform magnetic and gravitational fields. © 2016
Author keywords:
Dipolar hard spheres; Ferrofluids
Index keywords:
Least squares approximations; Magnetic fields; Magnetic fluids; Magnetic properties; Magnetism; Analytical expressions; Applied magnetic fields; Dipolar hard spheres; Gravitational fields; Sedimentati
DOI:
10.1016/j.jmmm.2016.08.033
Смотреть в Scopus:
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995486679&doi=10.1016%2fj.jmmm.2016.08.033&partnerID=40&md5=e0dfdf7c762cfe1b3bd2732e96230640
Соавторы в МНС:
Другие поля
Поле Значение
Link https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995486679&doi=10.1016%2fj.jmmm.2016.08.033&partnerID=40&md5=e0dfdf7c762cfe1b3bd2732e96230640
Affiliations Institute of Mathematics and Computer Sciences, Ural Federal University, 51 Lenin Avenue, Russian Federation
Author Keywords Dipolar hard spheres; Ferrofluids
Funding Details 02.A03.21.0006, Minobrnauka, Ministry of Education and Science of the Russian Federation; 3.12.2014/K, Minobrnauka, Ministry of Education and Science of the Russian Federation
Funding Text Authors gratefully acknowledge research funding from the Ministry of Education and Science of the Russian Federation [Contract no. 02.A03.21.0006, Project no. 3.12.2014/K].
References Groh, B., Dietrich, S., Structural and thermal properties of orientationally ordered dipolar fluids (1996) Phys. Rev. E, 53 (3), pp. 2509-2530; Klapp, S., Forstmann, F., Phase behavior of aligned dipolar hard spheres: integral equations and density functional results (1999) Phys. Rev. E, 60, pp. 3183-3198; Hayter, J.B., Pynn, R., Structure factor of a magnetically saturated ferrofluid (1982) Phys. Rev. E Lett., 49, pp. 1103-1106; Elfimova, E.A., Ivanov, A.O., Camp, P.J., Thermodynamic properties of ferrofluids in applied magnetic fields (2013) Phys. Rev. E, 88 (4). , 042310–1–11; Ivanov, A.O., Elfimova, E.A., Low-temperature magnetic susceptibility of concentrated ferrofluids: the influence of polydispersity (2015) J. Magn. Magn. Mater., 374, pp. 327-332; Bruns, W., The third osmotic virial coefficient of polymer solutions (1997) Macromolecules, 30 (15), pp. 4429-4431; Caracciolo, S., Mognetti, B.M., Pelissetto, A., Virial coefficients and osmotic pressure in polymer solutions in good-solvent conditions (2006) J. Chem. Phys., 125 (9). , 094903–1–8; Elfimova, E.A., Ivanov, A.O., Camp, P.J., Thermodynamics of dipolar hard spheres with low-to-intermediate coupling constants (2012) Phys. Rev. E, 86 (2). , 021126–1–9; Ivanov, A.O., Kuznetsova, O.B., Magnetic properties of dense ferrofluids: an influence of interparticle correlations (2001) Phys. Rev. E, 64 (4), pp. 414051-4140512; Pshenichnikov, A.F., Elfimova, E.A., Ivanov, A.O., Magnetophoresis, sedimentation, and diffusion of particles in concentrated magnetic fluids (2011) J. Chem. Phys., 134 (18), p. 111. , 184508–1–9; Elfimova, E.A., Ivanov, A.O., Lakhtina, E.V., Pshenichnikov, A.F., Camp, P.J., Sedimentation equilibria in polydisperse ferrofluids: critical comparisons between experiment, theory, and computer simulation (2016) Soft Matter, 12, pp. 4103-4112
Correspondence Address Vtulkina, E.D.; Institute of Mathematics and Computer Sciences, Ural Federal University, 51 Lenin Avenue, Russian Federation; email: katevtulkina@mail.ru
Publisher Elsevier B.V.
CODEN JMMMD
Language of Original Document English
Abbreviated Source Title J Magn Magn Mater
Source Scopus