Low temperature structural transitions in dipolar hard spheres: The influence on magnetic properties / Ivanov A. O.,Kantorovich S. S.,Rovigatti L.,Tavares J. M.,Sciortino F. // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 2015. - V. 383, l. . - P. 272-276.

ISSN/EISSN:

0304-8853 / 1873-4766

Type:

Article; Proceedings Paper

Abstract:

We investigate the structural chain-to-ring transition at low temperature in a gas of dipolar hard spheres (DRS). Due to the weakening of entropic contribution, ring formation becomes noticeable when the effective dipole-dipole magnetic interaction increases, It results in the redistribution of particles from usually observed flexible chains into flexible rings. The concentration (rho) of DI-IS plays a crucial part in this transition: at a very low rho only chains and rings are observed, whereas even a slight increase of the volume fraction leads to the formation of branched or defect structures. As a result, the fraction of DHS aggregated in defect-free rings turns out to be a non-monotonic function of rho. The average ring size is found to be a slower increasing function of rho when compared Lo that of chains. Both theory and computer simulations confirm the dramatic influence of the ring formation on the rho-dependence of the initial magnetic susceptibility (chi) when the temperature decreases. The rings clue to their zero total dipole moment are irresponsive to a weak magnetic field and drive to the strong decrease of the initial magnetic susceptibility. (C) 2014 Elsevier B.V. All rights reserved,

Author keywords:

Initial magnetic susceptibility; Low temperature; Structural transition; Dipolar hard spheres; Chain; Ring MONTE-CARLO; FLUIDS; DRUG; FERROFLUIDS; CHAIN; FERROCOLLOIDS; ASSOCIATION; SIMULATION; SCATTERING; DENSITIES

DOI:

10.1016/j.jmmm.2014.10.013

Web of Science ID:

ISI:000352104200055

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 1
Note	6th Moscow International Symposium on Magnetism (MISM), Lomonosov Moscow State Univ, Moscow, RUSSIA, JUN 29-JUL 03, 2014
Organization	Russian Fdn Basic Res; Dynasty Fdn; Russian Acad Sci; Japan Soc Promot Sci; Inst Theoret Appl Electromagnet; Dept Sci Ind Policy \& Entrepreneurship of Moscow (Moscow City Govt); German Houses Res \& Innovat (DWIH Moskau)
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-4766
Keywords-Plus	MONTE-CARLO; FLUIDS; DRUG; FERROFLUIDS; CHAIN; FERROCOLLOIDS; ASSOCIATION; SIMULATION; SCATTERING; DENSITIES
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email	alexey.ivanov@urfu.ru
ResearcherID-Numbers	Rovigatti, Lorenzo/K-2665-2012 Tavares, Jose/A-2891-2009 Kantorovich, Sofia/H-4586-2011 Physics Department, ISEL/F-6664-2010 Ivanov, Alexey/E-4442-2011
ORCID-Numbers	Rovigatti, Lorenzo/0000-0001-5017-2829 Tavares, Jose/0000-0002-1509-9707 Kantorovich, Sofia/0000-0001-5700-7009 Ivanov, Alexey/0000-0001-8239-4039
Funding-Acknowledgement	Austrian Science Fund (FWF): START-Projekt {[}Y 627-N27]; Portuguese Foundation for Science and Technology {[}EXCL/FIS-NAN/0083/2012]; Ministry of Education and Science of the Russian Federation {[}02.A03.21.000, 3.12.2014/K]; Austrian Research Fund (FWF) {[}M 1650-N27]
Funding-Text	The research has been partially supported by Austrian Science Fund (FWF): START-Projekt Y 627-N27. J.M.T. acknowledges financial support from the Portuguese Foundation for Science and Technology under Contract no. EXCL/FIS-NAN/0083/2012. A.O.I. and S.S.K. are supported by the Ministry of Education and Science of the Russian Federation (Contract 02.A03.21.000, Project 3.12.2014/K). L.R. acknowledges support from the Austrian Research Fund (FWF) through his Lise-Meitner Fellowship M 1650-N27.
Number-of-Cited-References	63
Usage-Count-Since-2013	23
Journal-ISO	J. Magn. Magn. Mater.
Doc-Delivery-Number	CE8OZ