New method for the determination of the particle magnetic moment distribution in a ferrofluid

We present a new method for the determination of the magnetic moment distri bution rho(mu) of ferrofluid particles from the magnetization curve measure d on diluted ferrofluid samples in the liquid state. The method employs the solution of the standard integral equation describing the magnetization of a non-interacting particle system in the given external field as a convolu tion of the Langevin function with the distribution of particle moments. No a priori assumptions concerning the shape of the corresponding distributio n are required. We present the reconstruction results obtained both for the computer simulated magnetization curves and for real experimental data. In the latter case we compare the distributions found using our algorithm wit h those calculated from the particle size distributions obtained via the el ectron microscopy images of the ferrofluid particles.