The initial magnetic susceptibility of polydisperse ferrofluids: A comparison between experiment and theory over a wide range of concentration / Solovyova Anna Y.,Goldina Olga A.,Ivanov Alexey O.,Lebedev Aleksandr V.,Elfimova Ekaterina A. // JOURNAL OF CHEMICAL PHYSICS. - 2016. - V. 145, l. 8.

ISSN/EISSN:

0021-9606 / 1089-7690

Type:

Article

Abstract:

Temperature dependencies of the static initial magnetic susceptibility for ferrofluids at various concentrations are studied using experiment and statistical-mechanical theories. Magnetic susceptibility measurements are carried out for twelve samples of magnetite-based fluids stabilized with oleic acid over a wide range of temperatures (210 K less than or similar to T less than or similar to 390 K); all samples have the same granulometric composition but different volume ferroparticle concentrations (0.2 less than or similar to phi less than or similar to 0.5). Experimental results are analyzed using three theories: the second-order modified mean-field theory (MMF2) {[}A. O. Ivanov and O. B. Kuznetsova, Phys. Rev. E 64, 41405 (2001)]; its correction for polydisperse ferrofluids arising from Mayer-type cluster expansion and taking into account the first terms of the polydisperse second virial coefficient {[}A. O. Ivanov and E. A. Elfimova, J. Magn. Magn. Mater 374, 327 (2015)]; and a new theory based on MMF2 combined with the first terms of the polydisperse second and third virial contributions to susceptibility. It turns out that the applicability of each theory depends on the experimental sample density. If twelve ferrofluid samples are split into three groups of strong, moderate, and low concentrated fluids, the temperature dependences of the initial magnetic susceptibility in each group are very precisely described by one of the three theories mentioned above. The determination of a universal formula predicting a ferrofluid susceptibility over a broad range of concentrations and temperatures remains as a challenge. Published by AIP Publishing.

Author keywords:

HARD-SPHERES; FLUIDS; FERROCOLLOIDS

DOI:

10.1063/1.4961405

Web of Science ID:

ISI:000383875500054

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG 28
Publisher	AMER INST PHYSICS
Address	1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Language	English
Article-Number	084909
EISSN	1089-7690
Keywords-Plus	HARD-SPHERES; FLUIDS; FERROCOLLOIDS
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Atomic, Molecular \& Chemical
Author-Email	ekaterina.elfimova@urfu.ru
ResearcherID-Numbers	Elfimova, Ekaterina/P-5003-2016 Ivanov, Alexey/E-4442-2011
ORCID-Numbers	Ivanov, Alexey/0000-0001-8239-4039 Elfimova, Ekaterian/0000-0002-8941-8184
Funding-Acknowledgement	Russian Foundation for Basic Research {[}13-01-96041, 14-01-96007, 16-31-00089 mol\_a]; Ministry of Education and Science of the Russian Federation {[}02.A03.21.0006, 3.12.2014/K]
Funding-Text	A.V.L. was supported by the Russian Foundation for Basic Research {[}Projects Nos. 13-01-96041 and 14-01-96007]; O.A.G., E.A.E., and A.O.I. 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)]; the work of A.Y.S. and O.A.G. was supported by the Russian Foundation for Basic Research {[}Projects No. 16-31-00089 mol\_a].
Number-of-Cited-References	32
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	4
Journal-ISO	J. Chem. Phys.
Doc-Delivery-Number	DW8AL