The influence of interparticle correlations and self-assembly on the dynamic initial magnetic susceptibility spectra of ferrofluids / Ivanov A. O.,Kantorovich S. S.,Elfimova E. A.,Zverev V. S.,Sindt J. O.,Camp P. J. // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 2017. - V. 431, l. . - P. 141-144.

ISSN/EISSN:

0304-8853 / 1873-4766

Type:

Article; Proceedings Paper

Abstract:

Using computer simulations and a mean-field theoretical approach, we study how the growth in dipolar interparticle correlations manifests itself in the frequency-dependent initial magnetic susceptibility of a ferrofluid. Our recently developed theory gives the correct single-particle Debye-theory results in the low-concentration, non-interacting regime; and it yields the exact leading-order contributions from interparticle correlations. The susceptibility spectra are analysed in terms of the low-frequency behaviours of the real and imaginary parts, and the position of the peak in the imaginary part. By comparing the theoretical predictions to the results from Brownian dynamics simulations, it is possible to identify the conditions where correlations are important, but where self-assembly has not developed. We also provide a qualitative explanation for the behaviour of spectra beyond the mean-field limit.

Author keywords:

Dynamic initial magnetic susceptibility; Dynamic spectra; Dipolar interaction; Polydispersity; Magnetic nanoparticles DIPOLAR INTERACTIONS; NEEL RELAXATION; NANOPARTICLES; HYPERTHERMIA; DEPENDENCE; BEHAVIOR; PARTICLE; FLUIDS; FIELD

DOI:

10.1016/j.jmmm.2016.09.119

Web of Science ID:

ISI:000399598600036

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 1
Note	14th International Conference on Magnetic Fluids (ICMF), Ekaterinburg, RUSSIA, JUL 04-08, 2016
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-4766
Keywords-Plus	DIPOLAR INTERACTIONS; NEEL RELAXATION; NANOPARTICLES; HYPERTHERMIA; DEPENDENCE; BEHAVIOR; PARTICLE; FLUIDS; FIELD
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email	alexey.ivanov@urfu.ru
ResearcherID-Numbers	Ivanov, Alexey/E-4442-2011 Zverev, Vladimir/M-7382-2013 Kantorovich, Sofia/H-4586-2011 Elfimova, Ekaterina/P-5003-2016
ORCID-Numbers	Ivanov, Alexey/0000-0001-8239-4039 Zverev, Vladimir/0000-0003-0422-1436 Kantorovich, Sofia/0000-0001-5700-7009 Elfimova, Ekaterian/0000-0002-8941-8184
Funding-Acknowledgement	Russian Science Foundation, Russia {[}15-12-10003]; FWF, Austria START-Project {[}Y 627-N27]; EU-Project {[}642774]
Funding-Text	This research was supported by Russian Science Foundation, Russia Grant no. 15-12-10003. S.S.K. is grateful to the FWF, Austria START-Project Y 627-N27 and EU-Project 642774 ETN-Colldense.
Number-of-Cited-References	27
Usage-Count-Last-180-days	9
Usage-Count-Since-2013	9
Journal-ISO	J. Magn. Magn. Mater.
Doc-Delivery-Number	ES5QV