How to analyse the structure factor in ferrofluids with strong magnetic interactions: a combined analytic and simulation approach / Pyanzina Elena,Kantorovich Sofia,Cerda Juan J.,Ivanov Alexey,Holm Christian // MOLECULAR PHYSICS. - 2009. - V. 107, l. 4-6. - P. 571-590.

ISSN/EISSN:
0026-8976 / 1362-3028
Type:
Article
Abstract:
We present a theoretical model for calculating the structure factor for ferrofluids with strong inter-particle magnetic dipole-dipole interactions, where chain aggregates are known to exist. Our analytical model is based on the minimization of a free energy density functional that allows us to explicitly construct the radial distribution functions of the ferroparticles. Both mono- and bi-disperse model systems have been investigated in the absence of an external magnetic field. We perform an extensive comparison of the theoretical model predictions with the results of molecular dynamic computer simulations for a wide range of ferroparticle densities and coupling parameters, and find encouraging agreement between the simulation data and theory. The behaviour of the structure factor in the region of the first peak and in the region of large wave vectors is studied in detail, and related to the observed microstructure. Our results demonstrate that the combined method developed in the present study is suitable for revealing the connection between microstructure and scattering images, and thus can help to interpret experimental results such as small angle neutron scattering images.
Author keywords:
ferrofluids; structure factor; density functional theory; molecular dynamics MONTE-CARLO SIMULATIONS; SMALL-ANGLE SCATTERING; DIPOLAR HARD-SPHERES; NEUTRON-SCATTERING; FERROMAGNETIC PARTICLES; FLUIDS; PHASE; ASSOCIATION; TRANSITIONS; LIQUIDS
DOI:
10.1080/00268970902893149
Web of Science ID:
ISI:000266244700029
Соавторы в МНС:
Другие поля
Поле Значение
Publisher TAYLOR \& FRANCIS LTD
Address 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
Language English
Article-Number PII 911463876
EISSN 1362-3028
Keywords-Plus MONTE-CARLO SIMULATIONS; SMALL-ANGLE SCATTERING; DIPOLAR HARD-SPHERES; NEUTRON-SCATTERING; FERROMAGNETIC PARTICLES; FLUIDS; PHASE; ASSOCIATION; TRANSITIONS; LIQUIDS
Research-Areas Chemistry; Physics
Web-of-Science-Categories Chemistry, Physical; Physics, Atomic, Molecular \& Chemical
Author-Email elena.pyanzina@usu.ru
ResearcherID-Numbers MPIP, Theory/I-9884-2014 Kantorovich, Sofia/H-4586-2011 Holm, Christian/C-2134-2009 Ivanov, Alexey/E-4442-2011 Cerda, Joan Josep/H-1306-2013
ORCID-Numbers Kantorovich, Sofia/0000-0001-5700-7009 Holm, Christian/0000-0003-2739-310X Ivanov, Alexey/0000-0001-8239-4039 Cerda, Joan Josep/0000-0003-1132-5989
Funding-Acknowledgement DFG-RFBR {[}HO 1108/12-1]; CRDF {[}Y3-P-05-11, PG07-005-02]; Grant of President RF {[}MK-412.2008.2]; RFBR {[}08-02-00647]; Dynasty Foundation; Spanish Ministerio de Educacion y Ciencia {[}EXP2006-0931]
Funding-Text We would like to dedicate this paper to Jean-Jacques Weis in appreciation of his important and inspiring contribution to science, and to dipolar systems in particular, and we are looking forward to hearing his new curious results from novel research fields in exotic lands. This research was carried out with the financial support of DFG-RFBR grant No. HO 1108/12-1, and a stipend to SK from the MPG. One of the authors (SK) was supported by CRDF grant Y3-P-05-11, and the Grant of President RF MK-412.2008.2. This research was partially supported by RFBR grant 08-02-00647 and CRDF grant PG07-005-02. One of the authors (ESP) is grateful to the Dynasty Foundation and was supported by the Government via a RF Stipend for PhD students. JC wants to thank the Spanish Ministerio de Educacion y Ciencia for a postdoctoral grant (No. EXP2006-0931).
Number-of-Cited-References 70
Usage-Count-Since-2013 19
Journal-ISO Mol. Phys.
Doc-Delivery-Number 448EA