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Graphical Magnetogranulometry of EMG909
Journal of Magnetism and Magnetic Materials ( IF 2.717 ) Pub Date : 2020-04-04 , DOI: 10.1016/j.jmmm.2020.166868
Ingo Rehberg; Reinhard Richter; Stefan Hartung

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.

更新日期:2020-04-06

 

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