## Title data

Rehberg, Ingo ; Richter, Reinhard ; Hartung, Stefan:

**Graphical Magnetogranulometry of EMG909.**

*In:* Journal of Magnetism and Magnetic Materials.
Vol. 508
(15 August 2020)
.
- No. 166868.

ISSN 0304-8853

DOI: https://doi.org/10.1016/j.jmmm.2020.166868

## Abstract in another language

The magnetization curve of the commercially available ferrofluid EMG909 is measured. It can adequately be

described by a superposition of four Langevin terms. The effective dipole strength of the magnetic particles in

this fluid is subsequently obtained by a graphical rectification of the magnetization curve based on the inverse

Langevin function. The method yields the arithmetic and the harmonic mean of the magnetic moment distribution

function, and a guess for the geometric mean and the relative standard deviation. It has the advantage

that it does not require a prejudiced guess of the distribution function of the poly-disperse suspension of magnetic particles.