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Experimental Study of Magnetic Interactions Between Colloidal Particles in Magnetic Fluids

Published

Author(s)

S Taketomi, Robert D. Shull

Abstract

In order to clarify whether or not there is any magnetic interaction between the magnetic colloidal particles in magnetic fluids (MF's), we compare the magnetization curve of a mother MF with that of a 1000-fold diluted solution. For a MF which showed clusters of colloidal particles in an optical microscope under an applied magnetic field, the hysteresis loops for the Mother MF and its 1000-fold dilution displayed different shapes in a weak magnetic field. We concluded from this result that there exist strong magnetic interactions between the particles in the MF. On the contrary for an MF which shows no clusters under optical microscopy, no differences in shapes of the hysteresis loops for the mother MF and its 1000-fold dilution were observed in the weak field region.
Citation
Journal of Applied Physics
Volume
91 No. 10
Issue
Part 3

Keywords

anisotropy, ferromagnetic resonance (FMR), magnetization, spinwave modes

Citation

Taketomi, S. and Shull, R. (2002), Experimental Study of Magnetic Interactions Between Colloidal Particles in Magnetic Fluids, Journal of Applied Physics (Accessed April 16, 2024)
Created April 30, 2002, Updated October 12, 2021