Universität zu Köln

Sokolsky, Sergey A., Solovyova, Anna Yu., Zverev, Vladimir S., Hess, Melissa ORCID: 0000-0002-9255-7185, Schmidt, Annette ORCID: 0000-0002-7284-7847 and Elfimova, Ekaterina A. (2021). Analysis of the ferrofluid microstructure based on the static magnetic measurements. J. Magn. Magn. Mater., 537. AMSTERDAM: ELSEVIER. ISSN 1873-4766

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Abstract

In this work, we applied regularized inversion method [New J. Phys. 19, 073012 (2017)] for microstructure analysis of 10 ferrofluid samples with different ferroparticle concentrations, which were obtained by diluting of the first one. The experimental measurements of the magnetization M(H) of all samples were subjected to numerical inversion using 120 ferroparticle fractions. Since volume concentration of ferrofluid samples does not exceed 3%, the properties of each fraction were described using Langevin theory. The magnetogranulomertic analysis confirmed that all 10 samples have the same magnetic moment distribution function, which has two peaks. The first (small) peak in the magnetic moment distribution function demonstrates the presence of a certain number of aggregates or correlated ferroparticle structures in the samples, whose magnetic moments have been compensated. The second peak corresponds to ordinary single particles distributed in the sample. The main advantage of using numerical inversion method is the absence of an a priori fixed form of the distribution function instead of a standard log-normal or Gamma-distribution.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sokolsky, Sergey A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Solovyova, Anna Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zverev, Vladimir S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hess, Melissa UNSPECIFIED orcid.org/0000-0002-9255-7185 UNSPECIFIED Schmidt, Annette UNSPECIFIED orcid.org/0000-0002-7284-7847 UNSPECIFIED Elfimova, Ekaterina A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-581986
DOI:	10.1016/j.jmmm.2021.168169
Journal or Publication Title:	J. Magn. Magn. Mater.
Volume:	537
Date:	2021
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1873-4766
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHYSICAL PARAMETERS Multiple languages Materials Science, Multidisciplinary; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58198