Magnetic properties of polydisperse ferrofluids: A critical comparison between experiment, theory, and computer simulation / Ivanov Alexey O.,Kantorovich Sofia S.,Reznikov Evgeniy N.,Holm Christian,Pshenichnikov Alexander F.,Lebedev Alexander V.,Chremos Alexandros,Camp Philip J. // PHYSICAL REVIEW E. - 2007. - V. 75, l. 6, 1.

ISSN/EISSN:

1539-3755 / нет данных

Type:

Article

Abstract:

Experimental magnetization curves for a polydisperse ferrofluid at various concentrations are examined using analytical theories and computer simulations with the aim of establishing a robust method for obtaining the magnetic-core diameter distribution function p(x). Theoretical expressions are fitted to the experimental data to yield the parameters of p(x). It is shown that the majority of available theories yield results that depend strongly on the ferrofluid concentration, even though the magnetic composition should be fixed. The sole exception is the second-order modified mean-field (MMF2) theory of Ivanov and Kuznetsova {[}Phys. Rev. E 64, 041405 (2001)] which yields consistent results over the full experimental range of ferrofluid concentration. To check for consistency, extensive molecular dynamics and Monte Carlo simulations are performed on systems with discretized versions of p(x) corresponding as closely as possible to that of the real ferrofluid. Essentially perfect agreement between experiment, theory, and computer simulation is demonstrated. In addition, the MMF2 theory provides excellent predictions for the initial susceptibility measured in simulations.

Author keywords:

CRYOGENIC ELECTRON-MICROSCOPY; BROWNIAN DYNAMICS; DIPOLAR CHAINS; FERROCOLLOIDS; FLUIDS

DOI:

10.1103/PhysRevE.75.061405

Web of Science ID:

ISI:000247624000060

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	AMERICAN PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	061405
Keywords-Plus	CRYOGENIC ELECTRON-MICROSCOPY; BROWNIAN DYNAMICS; DIPOLAR CHAINS; FERROCOLLOIDS; FLUIDS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Fluids \& Plasmas; Physics, Mathematical
Author-Email	philip.camp@ed.ac.uk
ResearcherID-Numbers	Pshenichnikov, Alexander/F-9511-2013 Lebedev, Aleksandr/I-2100-2013 Kantorovich, Sofia/H-4586-2011 MPIP, Theory/I-9884-2014 Camp, Philip/J-7757-2013 Ivanov, Alexey/E-4442-2011 Holm, Christian/C-2134-2009 Chremos, Alexandros/B-8856-2009
ORCID-Numbers	Kantorovich, Sofia/0000-0001-5700-7009 Ivanov, Alexey/0000-0001-8239-4039 Holm, Christian/0000-0003-2739-310X Chremos, Alexandros/0000-0002-1254-3972 Camp, Philip/0000-0002-7901-1364
Number-of-Cited-References	34
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	16
Journal-ISO	Phys. Rev. E
Doc-Delivery-Number	184EN