Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102177
Title: The influence of interparticle correlations and self-assembly on the dynamic initial magnetic susceptibility spectra of ferrofluids
Authors: Ivanov, A. O.
Kantorovich, S. S.
Elfimova, E. A.
Zverev, V. S.
Sindt, J. O.
Camp, P. J.
Issue Date: 2017
Publisher: Elsevier B.V.
Citation: The influence of interparticle correlations and self-assembly on the dynamic initial magnetic susceptibility spectra of ferrofluids / A. O. Ivanov, S. S. Kantorovich, E. A. Elfimova, et al. — DOI 10.1016/j.jmmm.2016.09.119 // Journal of Magnetism and Magnetic Materials. — 2017. — Vol. 431. — P. 141-144.
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. © 2016 Elsevier B.V.
Keywords: DIPOLAR INTERACTION
DYNAMIC INITIAL MAGNETIC SUSCEPTIBILITY
DYNAMIC SPECTRA
MAGNETIC NANOPARTICLES
POLYDISPERSITY
MAGNETIC FLUIDS
MAGNETIC SUSCEPTIBILITY
MAGNETISM
NANOPARTICLES
POLYDISPERSITY
SELF ASSEMBLY
BROWNIAN DYNAMICS SIMULATIONS
DIPOLAR INTERACTION
DYNAMIC SPECTRUM
FREQUENCY DEPENDENT
INTER-PARTICLE CORRELATIONS
MAGNETIC NANO-PARTICLES
REAL AND IMAGINARY
THEORETICAL APPROACH
NANOMAGNETICS
URI: http://hdl.handle.net/10995/102177
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85001907571
PURE ID: 1691010
308a2895-a85b-40b2-96df-56e9bc851e07
ISSN: 3048853
DOI: 10.1016/j.jmmm.2016.09.119
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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