Ferrite based ferrofluid is very common and easy to synthesize. Does anyone here have experience with Alloy (binary or ternary) based ferrofluid with any of the carrier liquid. If so please share.
you may get detailed information from the paper by Sato et al,Preparation and properties of ferromagnetic FePt dispersion, J. Mag.Mag. Matr.,289, March 2005,1-4.