Measuring magnetic moments of polydisperse ferrofluids utilizing the inverse Langevin function

Ingo Rehberg, Reinhard Richter, Stefan Hartung, Niklas Lucht, Birgit Hankiewicz, and Thomas Friedrich
Phys. Rev. B 100, 134425 – Published 18 October 2019

Abstract

The dipole strength of magnetic particles in a suspension is obtained by a graphical rectification of the magnetization curves based on the inverse Langevin function. The method yields the arithmetic and the harmonic mean of the particle distribution. It has an advantage compared to the fitting of magnetization curves to some appropriate mathematical model: It does not rely on assuming a particular distribution function of the particles.

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  • Received 24 July 2019

DOI:https://doi.org/10.1103/PhysRevB.100.134425

©2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Polymers & Soft MatterCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Ingo Rehberg1, Reinhard Richter1, Stefan Hartung1, Niklas Lucht2, Birgit Hankiewicz2, and Thomas Friedrich3

  • 1Experimental Physics 5, University of Bayreuth, 95440 Bayreuth, Germany
  • 2Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany
  • 3Institute of Medical Engineering, University of Lübeck, 23562 Lübeck, Germany

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Issue

Vol. 100, Iss. 13 — 1 October 2019

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