English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/80354
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Study of the structure factor anisotropy and long range correlations of ferrofluids in the dilute low-coupling regime

AuthorsCerdà, Joan J. ; Elfimova, Ekaterina; Ballenegger, V.; Krutikova, Ekaterina; Ivanovc, Alexey; Holm, Christian
Issue DateMay-2011
PublisherElsevier
CitationJournal of Magnetism and Magnetic Materials 323(10): 1246-1253 (2011)
AbstractDipolar 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≲2λ≲2, and volume fraction φ≲0.25φ≲0.25. When λ>1λ>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.
URIhttp://hdl.handle.net/10261/80354
DOI10.1016/j.jmmm.2010.11.015
Identifiersdoi: 10.1016/j.jmmm.2010.11.015
issn: 0304-8853
Appears in Collections:(IFISC) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.