Loading…

Non-regularized inversion method from light scattering applied to ferrofluid magnetization curves for magnetic size distribution analysis

A numerical inversion method known from the analysis of light scattering by colloidal dispersions is now applied to magnetization curves of ferrofluids. The distribution of magnetic particle sizes or dipole moments is determined without assuming that the distribution is unimodal or of a particular s...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2014-03, Vol.353, p.110-115
Main Authors: van Rijssel, Jos, Kuipers, Bonny W.M., Erné, Ben H.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A numerical inversion method known from the analysis of light scattering by colloidal dispersions is now applied to magnetization curves of ferrofluids. The distribution of magnetic particle sizes or dipole moments is determined without assuming that the distribution is unimodal or of a particular shape. The inversion method enforces positive number densities via a non-negative least squares procedure. It is tested successfully on experimental and simulated data for ferrofluid samples with known multimodal size distributions. The created computer program MINORIM is made available on the web. •A method from light scattering is applied to analyze ferrofluid magnetization curves.•A magnetic size distribution is obtained without prior assumption of its shape.•The method is tested successfully on ferrofluids with a known size distribution.•The practical limits of the method are explored with simulated data including noise.•This method is implemented in the program MINORIM, freely available online.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2013.10.025